156977142 has 32 divisors (see below), whose sum is σ = 360225792. Its totient is φ = 44673024.

The previous prime is 156977141. The next prime is 156977159. The reversal of 156977142 is 241779651.

It is a happy number.

It is a super-2 number, since 2×156977142² = 49283646220976328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 156977094 and 156977103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156977141) 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 15 ways as a sum of consecutive naturals, for example, 3523 + ... + 18065.

It is an arithmetic number, because the mean of its divisors is an integer number (11257056).

Almost surely, 2^156977142 is an apocalyptic number.

156977142 is an abundant number, since it is smaller than the sum of its proper divisors (203248650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156977142 is a wasteful number, since it uses less digits than its factorization.

156977142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14812.

The product of its digits is 105840, while the sum is 42.

The square root of 156977142 is about 12529.0519194391. The cubic root of 156977142 is about 539.4428890825.

The spelling of 156977142 in words is "one hundred fifty-six million, nine hundred seventy-seven thousand, one hundred forty-two".