157709242 has 8 divisors (see below), whose sum is σ = 240573600. Its totient is φ = 77518044.

The previous prime is 157709219. The next prime is 157709243. The reversal of 157709242 is 242907751.

157709242 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (157709243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668142 + ... + 668377.

It is an arithmetic number, because the mean of its divisors is an integer number (30071700).

Almost surely, 2^157709242 is an apocalyptic number.

157709242 is a deficient number, since it is larger than the sum of its proper divisors (82864358).

157709242 is a wasteful number, since it uses less digits than its factorization.

157709242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336580.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 157709242 is about 12558.2340319011. The cubic root of 157709242 is about 540.2801952364.

The spelling of 157709242 in words is "one hundred fifty-seven million, seven hundred nine thousand, two hundred forty-two".