1131860 has 24 divisors (see below), whose sum is σ = 2517480. Its totient is φ = 425984.

The previous prime is 1131857. The next prime is 1131863. The reversal of 1131860 is 681311.

It is an interprime number because it is at equal distance from previous prime (1131857) and next prime (1131863).

It can be written as a sum of positive squares in 4 ways, for example, as 183184 + 948676 = 428^2 + 974^2 .

It is a super-2 number, since 2×1131860² = 2562214119200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1325 + ... + 2004.

It is an arithmetic number, because the mean of its divisors is an integer number (104895).

2^1131860 is an apocalyptic number.

1131860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131860 is an abundant number, since it is smaller than the sum of its proper divisors (1385620).

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

1131860 is a wasteful number, since it uses less digits than its factorization.

1131860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355 (or 3353 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1131860 is about 1063.8890919640. The cubic root of 1131860 is about 104.2151610646.

It can be divided in two parts, 1131 and 860, that added together give a palindrome (1991).

The spelling of 1131860 in words is "one million, one hundred thirty-one thousand, eight hundred sixty".