120557531 has 8 divisors (see below), whose sum is σ = 122199840. Its totient is φ = 118921792.

The previous prime is 120557501. The next prime is 120557537. The reversal of 120557531 is 135755021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120557531 - 2²⁶ = 53448667 is a prime.

It is a super-2 number, since 2×120557531² = 29068236561631922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120557494 and 120557503.

It is not an unprimeable number, because it can be changed into a prime (120557537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43421 + ... + 46113.

It is an arithmetic number, because the mean of its divisors is an integer number (15274980).

Almost surely, 2^120557531 is an apocalyptic number.

120557531 is a deficient number, since it is larger than the sum of its proper divisors (1642309).

120557531 is an equidigital number, since it uses as much as digits as its factorization.

120557531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3285.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 120557531 is about 10979.8693525925. The cubic root of 120557531 is about 494.0051180443.

The spelling of 120557531 in words is "one hundred twenty million, five hundred fifty-seven thousand, five hundred thirty-one".