156238442 has 4 divisors (see below), whose sum is σ = 234357666. Its totient is φ = 78119220.

The previous prime is 156238429. The next prime is 156238447. The reversal of 156238442 is 244832651.

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

It can be written as a sum of positive squares in only one way, i.e., 154281241 + 1957201 = 12421^2 + 1399^2 .

It is not an unprimeable number, because it can be changed into a prime (156238447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39059609 + ... + 39059612.

Almost surely, 2^156238442 is an apocalyptic number.

156238442 is a deficient number, since it is larger than the sum of its proper divisors (78119224).

156238442 is an equidigital number, since it uses as much as digits as its factorization.

156238442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78119223.

The product of its digits is 46080, while the sum is 35.

The square root of 156238442 is about 12499.5376714501. The cubic root of 156238442 is about 538.5953916706.

It can be divided in two parts, 1562 and 38442, that added together give a palindrome (40004).

The spelling of 156238442 in words is "one hundred fifty-six million, two hundred thirty-eight thousand, four hundred forty-two".