6402659 has 4 divisors (see below), whose sum is σ = 6779304. Its totient is φ = 6026016.

The previous prime is 6402653. The next prime is 6402661. The reversal of 6402659 is 9562046.

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

It is a cyclic number.

It is not a de Polignac number, because 6402659 - 2¹² = 6398563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6402653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188297 + ... + 188330.

It is an arithmetic number, because the mean of its divisors is an integer number (1694826).

Almost surely, 2^6402659 is an apocalyptic number.

6402659 is a deficient number, since it is larger than the sum of its proper divisors (376645).

6402659 is a wasteful number, since it uses less digits than its factorization.

6402659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376644.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 6402659 is about 2530.3476045793. The cubic root of 6402659 is about 185.6892622526.

The spelling of 6402659 in words is "six million, four hundred two thousand, six hundred fifty-nine".