157390942 has 4 divisors (see below), whose sum is σ = 236086416. Its totient is φ = 78695470.

The previous prime is 157390931. The next prime is 157390949. The reversal of 157390942 is 249093751.

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

It is a junction number, because it is equal to n+sod(n) for n = 157390895 and 157390904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157390949) 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 as a sum of consecutive naturals, namely, 39347734 + ... + 39347737.

It is an arithmetic number, because the mean of its divisors is an integer number (59021604).

Almost surely, 2^157390942 is an apocalyptic number.

157390942 is a deficient number, since it is larger than the sum of its proper divisors (78695474).

157390942 is an equidigital number, since it uses as much as digits as its factorization.

157390942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78695473.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 157390942 is about 12545.5546708784. The cubic root of 157390942 is about 539.9164731347.

The spelling of 157390942 in words is "one hundred fifty-seven million, three hundred ninety thousand, nine hundred forty-two".