1123420 has 12 divisors (see below), whose sum is σ = 2359224. Its totient is φ = 449360.

The previous prime is 1123403. The next prime is 1123427. The reversal of 1123420 is 243211.

1123420 = T₄₆₉ + T₄₇₀ + ... + T₄₇₈.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1123420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28066 + ... + 28105.

It is an arithmetic number, because the mean of its divisors is an integer number (196602).

2^1123420 is an apocalyptic number.

1123420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123420 is an abundant number, since it is smaller than the sum of its proper divisors (1235804).

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

1123420 is a wasteful number, since it uses less digits than its factorization.

1123420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56180 (or 56178 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1123420 is about 1059.9150909389. The cubic root of 1123420 is about 103.9554789715.

Adding to 1123420 its reverse (243211), we get a palindrome (1366631).

The spelling of 1123420 in words is "one million, one hundred twenty-three thousand, four hundred twenty".