120661157 has 4 divisors (see below), whose sum is σ = 120684096. Its totient is φ = 120638220.

The previous prime is 120661133. The next prime is 120661193. The reversal of 120661157 is 751166021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751166021 = 419 ⋅1792759.

It is a cyclic number.

It is not a de Polignac number, because 120661157 - 2⁸ = 120660901 is a prime.

It is a super-2 number, since 2×120661157² = 29118229617157298, 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 (120621157) 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, 788 + ... + 15554.

It is an arithmetic number, because the mean of its divisors is an integer number (30171024).

Almost surely, 2^120661157 is an apocalyptic number.

It is an amenable number.

120661157 is a deficient number, since it is larger than the sum of its proper divisors (22939).

120661157 is an equidigital number, since it uses as much as digits as its factorization.

120661157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22938.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 120661157 is about 10984.5872475938. The cubic root of 120661157 is about 494.1466192665.

The spelling of 120661157 in words is "one hundred twenty million, six hundred sixty-one thousand, one hundred fifty-seven".