7157457 has 8 divisors (see below), whose sum is σ = 10603680. Its totient is φ = 4771620.

The previous prime is 7157443. The next prime is 7157477. The reversal of 7157457 is 7547517.

It is not a de Polignac number, because 7157457 - 2⁸ = 7157201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7157407) 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 in 7 ways as a sum of consecutive naturals, for example, 132519 + ... + 132572.

It is an arithmetic number, because the mean of its divisors is an integer number (1325460).

Almost surely, 2^7157457 is an apocalyptic number.

It is an amenable number.

7157457 is a deficient number, since it is larger than the sum of its proper divisors (3446223).

7157457 is a wasteful number, since it uses less digits than its factorization.

7157457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265100 (or 265094 counting only the distinct ones).

The product of its digits is 34300, while the sum is 36.

The square root of 7157457 is about 2675.3424079919. The cubic root of 7157457 is about 192.7168030158.

It can be divided in two parts, 71574 and 57, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 7157457 in words is "seven million, one hundred fifty-seven thousand, four hundred fifty-seven".