156655121 has 24 divisors (see below), whose sum is σ = 189095424. Its totient is φ = 126996480.

The previous prime is 156655117. The next prime is 156655123. The reversal of 156655121 is 121556651.

It is not a de Polignac number, because 156655121 - 2² = 156655117 is a prime.

It is a super-3 number, since 3×156655121³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (156655123) 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 23 ways as a sum of consecutive naturals, for example, 609425 + ... + 609681.

It is an arithmetic number, because the mean of its divisors is an integer number (7878976).

Almost surely, 2^156655121 is an apocalyptic number.

It is an amenable number.

156655121 is a deficient number, since it is larger than the sum of its proper divisors (32440303).

156655121 is an equidigital number, since it uses as much as digits as its factorization.

156655121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 348 counting only the distinct ones).

The product of its digits is 9000, while the sum is 32.

The square root of 156655121 is about 12516.1943497215. The cubic root of 156655121 is about 539.0737677029.

The spelling of 156655121 in words is "one hundred fifty-six million, six hundred fifty-five thousand, one hundred twenty-one".