157156457 has 4 divisors (see below), whose sum is σ = 157194240. Its totient is φ = 157118676.

The previous prime is 157156411. The next prime is 157156459. The reversal of 157156457 is 754651751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157156457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157156459) 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, 11753 + ... + 21270.

It is an arithmetic number, because the mean of its divisors is an integer number (39298560).

Almost surely, 2^157156457 is an apocalyptic number.

It is an amenable number.

157156457 is a deficient number, since it is larger than the sum of its proper divisors (37783).

157156457 is an equidigital number, since it uses as much as digits as its factorization.

157156457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37782.

The product of its digits is 147000, while the sum is 41.

The square root of 157156457 is about 12536.2058454702. The cubic root of 157156457 is about 539.6482128048.

The spelling of 157156457 in words is "one hundred fifty-seven million, one hundred fifty-six thousand, four hundred fifty-seven".