120561031 has 4 divisors (see below), whose sum is σ = 122087200. Its totient is φ = 119034864.

The previous prime is 120561017. The next prime is 120561043. The reversal of 120561031 is 130165021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120561031 is a prime.

It is a super-2 number, since 2×120561031² = 29069924391565922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120561011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762966 + ... + 763123.

It is an arithmetic number, because the mean of its divisors is an integer number (30521800).

Almost surely, 2^120561031 is an apocalyptic number.

120561031 is a deficient number, since it is larger than the sum of its proper divisors (1526169).

120561031 is an equidigital number, since it uses as much as digits as its factorization.

120561031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526168.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 120561031 is about 10980.0287340243. The cubic root of 120561031 is about 494.0098986144.

The spelling of 120561031 in words is "one hundred twenty million, five hundred sixty-one thousand, thirty-one".