1131420 has 48 divisors (see below), whose sum is σ = 3215520. Its totient is φ = 297216.

The previous prime is 1131419. The next prime is 1131421. The reversal of 1131420 is 241311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1131419) and next prime (1131421).

It is a super-2 number, since 2×1131420² = 2560222432800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1131396 and 1131405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6454 + ... + 6626.

It is an arithmetic number, because the mean of its divisors is an integer number (66990).

2^1131420 is an apocalyptic number.

1131420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607760).

1131420 is an abundant number, since it is smaller than the sum of its proper divisors (2084100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131420 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 1131420 = (2114013)₉.

1131420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1131420 is about 1063.6822833911. The cubic root of 1131420 is about 104.2016550909.

Adding to 1131420 its reverse (241311), we get a palindrome (1372731).

It can be divided in two parts, 1131 and 420, that added together give a palindrome (1551).

The spelling of 1131420 in words is "one million, one hundred thirty-one thousand, four hundred twenty".