6402557 has 16 divisors (see below), whose sum is σ = 7817472. Its totient is φ = 5118720.

The previous prime is 6402547. The next prime is 6402577. The reversal of 6402557 is 7552046.

6402557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6402557 - 2⁴ = 6402541 is a prime.

It is a super-2 number, since 2×6402557² = 81985472276498, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20432 + ... + 20742.

It is an arithmetic number, because the mean of its divisors is an integer number (488592).

Almost surely, 2^6402557 is an apocalyptic number.

It is an amenable number.

6402557 is a deficient number, since it is larger than the sum of its proper divisors (1414915).

6402557 is a wasteful number, since it uses less digits than its factorization.

6402557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 6402557 is about 2530.3274491654. The cubic root of 6402557 is about 185.6882761828.

The spelling of 6402557 in words is "six million, four hundred two thousand, five hundred fifty-seven".