157072742 has 4 divisors (see below), whose sum is σ = 235609116. Its totient is φ = 78536370.

The previous prime is 157072739. The next prime is 157072757. The reversal of 157072742 is 247270751.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39268184 + ... + 39268187.

It is an arithmetic number, because the mean of its divisors is an integer number (58902279).

Almost surely, 2^157072742 is an apocalyptic number.

157072742 is a deficient number, since it is larger than the sum of its proper divisors (78536374).

157072742 is an equidigital number, since it uses as much as digits as its factorization.

157072742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78536373.

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 157072742 is about 12532.8664718013. The cubic root of 157072742 is about 539.5523748206.

The spelling of 157072742 in words is "one hundred fifty-seven million, seventy-two thousand, seven hundred forty-two".