156557120 has 28 divisors (see below), whose sum is σ = 372802404. Its totient is φ = 62622720.

The previous prime is 156557119. The next prime is 156557129. The reversal of 156557120 is 21755651.

It can be written as a sum of positive squares in 2 ways, for example, as 17505856 + 139051264 = 4184^2 + 11792^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156557129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244301 + ... + 244940.

Almost surely, 2^156557120 is an apocalyptic number.

156557120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156557120 is an abundant number, since it is smaller than the sum of its proper divisors (216245284).

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

156557120 is an equidigital number, since it uses as much as digits as its factorization.

156557120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489258 (or 489248 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 156557120 is about 12512.2787692730. The cubic root of 156557120 is about 538.9613322070.

It can be divided in two parts, 1565 and 57120, that added together give a palindrome (58685).

The spelling of 156557120 in words is "one hundred fifty-six million, five hundred fifty-seven thousand, one hundred twenty".