120615531 has 4 divisors (see below), whose sum is σ = 160820712. Its totient is φ = 80410352.

The previous prime is 120615487. The next prime is 120615533. The reversal of 120615531 is 135516021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120615531 - 2⁷ = 120615403 is a prime.

It is a super-2 number, since 2×120615531² = 29096212636823922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (120615533) 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, 20102586 + ... + 20102591.

It is an arithmetic number, because the mean of its divisors is an integer number (40205178).

Almost surely, 2^120615531 is an apocalyptic number.

120615531 is a deficient number, since it is larger than the sum of its proper divisors (40205181).

120615531 is an equidigital number, since it uses as much as digits as its factorization.

120615531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40205180.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 120615531 is about 10982.5102321828. The cubic root of 120615531 is about 494.0843269857.

The spelling of 120615531 in words is "one hundred twenty million, six hundred fifteen thousand, five hundred thirty-one".