6404587 has 4 divisors (see below), whose sum is σ = 7319536. Its totient is φ = 5489640.

The previous prime is 6404581. The next prime is 6404591. The reversal of 6404587 is 7854046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6404587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6404581) 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, 457464 + ... + 457477.

It is an arithmetic number, because the mean of its divisors is an integer number (1829884).

Almost surely, 2^6404587 is an apocalyptic number.

6404587 is a deficient number, since it is larger than the sum of its proper divisors (914949).

6404587 is an equidigital number, since it uses as much as digits as its factorization.

6404587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914948.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 6404587 is about 2530.7285512279. The cubic root of 6404587 is about 185.7078989351.

The spelling of 6404587 in words is "six million, four hundred four thousand, five hundred eighty-seven".