8731457 has 12 divisors (see below), whose sum is σ = 10300356. Its totient is φ = 7378560.

The previous prime is 8731447. The next prime is 8731477. The reversal of 8731457 is 7541378.

It can be written as a sum of positive squares in 2 ways, for example, as 2660161 + 6071296 = 1631^2 + 2464^2 .

It is not a de Polignac number, because 8731457 - 2⁸ = 8731201 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8731417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2357 + ... + 4797.

It is an arithmetic number, because the mean of its divisors is an integer number (858363).

Almost surely, 2^8731457 is an apocalyptic number.

It is an amenable number.

8731457 is a deficient number, since it is larger than the sum of its proper divisors (1568899).

8731457 is a wasteful number, since it uses less digits than its factorization.

8731457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528 (or 2521 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 8731457 is about 2954.9038901460. The cubic root of 8731457 is about 205.9185982461.

The spelling of 8731457 in words is "eight million, seven hundred thirty-one thousand, four hundred fifty-seven".