8641457 has 12 divisors (see below), whose sum is σ = 10059588. Its totient is φ = 7392000.

The previous prime is 8641453. The next prime is 8641469. The reversal of 8641457 is 7541468.

It can be written as a sum of positive squares in 2 ways, for example, as 3254416 + 5387041 = 1804^2 + 2321^2 .

It is not a de Polignac number, because 8641457 - 2² = 8641453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8641453) 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 11 ways as a sum of consecutive naturals, for example, 44 + ... + 4157.

It is an arithmetic number, because the mean of its divisors is an integer number (838299).

Almost surely, 2^8641457 is an apocalyptic number.

It is an amenable number.

8641457 is a deficient number, since it is larger than the sum of its proper divisors (1418131).

8641457 is a wasteful number, since it uses less digits than its factorization.

8641457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240 (or 4229 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 8641457 is about 2939.6355216251. The cubic root of 8641457 is about 205.2086473740.

The spelling of 8641457 in words is "eight million, six hundred forty-one thousand, four hundred fifty-seven".