157315742 has 4 divisors (see below), whose sum is σ = 235973616. Its totient is φ = 78657870.

The previous prime is 157315733. The next prime is 157315747. The reversal of 157315742 is 247513751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247513751 = 2137 ⋅115823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157315747) 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, 39328934 + ... + 39328937.

It is an arithmetic number, because the mean of its divisors is an integer number (58993404).

Almost surely, 2^157315742 is an apocalyptic number.

157315742 is a deficient number, since it is larger than the sum of its proper divisors (78657874).

157315742 is an equidigital number, since it uses as much as digits as its factorization.

157315742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78657873.

The product of its digits is 29400, while the sum is 35.

The square root of 157315742 is about 12542.5572352691. The cubic root of 157315742 is about 539.8304703310.

The spelling of 157315742 in words is "one hundred fifty-seven million, three hundred fifteen thousand, seven hundred forty-two".