6457491 has 12 divisors (see below), whose sum is σ = 9486360. Its totient is φ = 4231680.

The previous prime is 6457489. The next prime is 6457531. The reversal of 6457491 is 1947546.

6457491 is a `hidden beast` number, since 645 + 7 + 4 + 9 + 1 = 666.

It is not a de Polignac number, because 6457491 - 2¹ = 6457489 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6457421) 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, 5550 + ... + 6611.

It is an arithmetic number, because the mean of its divisors is an integer number (790530).

Almost surely, 2^6457491 is an apocalyptic number.

6457491 is a deficient number, since it is larger than the sum of its proper divisors (3028869).

6457491 is a wasteful number, since it uses less digits than its factorization.

6457491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12226 (or 12223 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 6457491 is about 2541.1593810700. The cubic root of 6457491 is about 186.2178335814.

The spelling of 6457491 in words is "six million, four hundred fifty-seven thousand, four hundred ninety-one".