6402015 has 24 divisors (see below), whose sum is σ = 11203920. Its totient is φ = 3381504.

The previous prime is 6402007. The next prime is 6402041. The reversal of 6402015 is 5102046.

It is a happy number.

6402015 is a `hidden beast` number, since 640 + 20 + 1 + 5 = 666.

It is not a de Polignac number, because 6402015 - 2³ = 6402007 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4456 + ... + 5714.

It is an arithmetic number, because the mean of its divisors is an integer number (466830).

Almost surely, 2^6402015 is an apocalyptic number.

6402015 is a deficient number, since it is larger than the sum of its proper divisors (4801905).

6402015 is a wasteful number, since it uses less digits than its factorization.

6402015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383 (or 1380 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 6402015 is about 2530.2203461359. The cubic root of 6402015 is about 185.6830363031.

The spelling of 6402015 in words is "six million, four hundred two thousand, fifteen".