156640142 has 32 divisors (see below), whose sum is σ = 268012800. Its totient is φ = 68197248.

The previous prime is 156640111. The next prime is 156640153. The reversal of 156640142 is 241046651.

It is a super-2 number, since 2×156640142² = 49072268171560328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24959 + ... + 30597.

It is an arithmetic number, because the mean of its divisors is an integer number (8375400).

Almost surely, 2^156640142 is an apocalyptic number.

156640142 is a deficient number, since it is larger than the sum of its proper divisors (111372658).

156640142 is a wasteful number, since it uses less digits than its factorization.

156640142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5720.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 156640142 is about 12515.5959506529. The cubic root of 156640142 is about 539.0565854933.

Adding to 156640142 its reverse (241046651), we get a palindrome (397686793).

The spelling of 156640142 in words is "one hundred fifty-six million, six hundred forty thousand, one hundred forty-two".