157238242 has 16 divisors (see below), whose sum is σ = 269714880. Its totient is φ = 67346928.

The previous prime is 157238209. The next prime is 157238251. The reversal of 157238242 is 242832751.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 157238198 and 157238207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37033 + ... + 41059.

It is an arithmetic number, because the mean of its divisors is an integer number (16857180).

Almost surely, 2^157238242 is an apocalyptic number.

157238242 is a deficient number, since it is larger than the sum of its proper divisors (112476638).

157238242 is a wasteful number, since it uses less digits than its factorization.

157238242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6825.

The product of its digits is 26880, while the sum is 34.

The square root of 157238242 is about 12539.4673730586. The cubic root of 157238242 is about 539.7418084400.

The spelling of 157238242 in words is "one hundred fifty-seven million, two hundred thirty-eight thousand, two hundred forty-two".