157257871 has 4 divisors (see below), whose sum is σ = 166508352. Its totient is φ = 148007392.

The previous prime is 157257869. The next prime is 157257883. The reversal of 157257871 is 178752751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178752751 = 4127 ⋅43313.

It is a cyclic number.

It is not a de Polignac number, because 157257871 - 2¹ = 157257869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157257071) 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, 4625215 + ... + 4625248.

It is an arithmetic number, because the mean of its divisors is an integer number (41627088).

Almost surely, 2^157257871 is an apocalyptic number.

157257871 is a deficient number, since it is larger than the sum of its proper divisors (9250481).

157257871 is an equidigital number, since it uses as much as digits as its factorization.

157257871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9250480.

The product of its digits is 137200, while the sum is 43.

The square root of 157257871 is about 12540.2500373796. The cubic root of 157257871 is about 539.7642672494.

The spelling of 157257871 in words is "one hundred fifty-seven million, two hundred fifty-seven thousand, eight hundred seventy-one".