157270457 has 4 divisors (see below), whose sum is σ = 157296420. Its totient is φ = 157244496.

The previous prime is 157270453. The next prime is 157270493. The reversal of 157270457 is 754072751.

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

It can be written as a sum of positive squares in 2 ways, for example, as 92371321 + 64899136 = 9611^2 + 8056^2 .

It is a cyclic number.

It is not a de Polignac number, because 157270457 - 2² = 157270453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157270457.

It is not an unprimeable number, because it can be changed into a prime (157270453) 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, 1463 + ... + 17795.

It is an arithmetic number, because the mean of its divisors is an integer number (39324105).

Almost surely, 2^157270457 is an apocalyptic number.

It is an amenable number.

157270457 is a deficient number, since it is larger than the sum of its proper divisors (25963).

157270457 is an equidigital number, since it uses as much as digits as its factorization.

157270457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25962.

The product of its (nonzero) digits is 68600, while the sum is 38.

The square root of 157270457 is about 12540.7518514641. The cubic root of 157270457 is about 539.7786667234.

The spelling of 157270457 in words is "one hundred fifty-seven million, two hundred seventy thousand, four hundred fifty-seven".