6402775 has 12 divisors (see below), whose sum is σ = 7986592. Its totient is φ = 5091840.

The previous prime is 6402751. The next prime is 6402779. The reversal of 6402775 is 5772046.

It is a de Polignac number, because none of the positive numbers 2^k-6402775 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402779) 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, 4162 + ... + 5488.

Almost surely, 2^6402775 is an apocalyptic number.

6402775 is a deficient number, since it is larger than the sum of its proper divisors (1583817).

6402775 is a wasteful number, since it uses less digits than its factorization.

6402775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530 (or 1525 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 6402775 is about 2530.3705262273. The cubic root of 6402775 is about 185.6903836525.

The spelling of 6402775 in words is "six million, four hundred two thousand, seven hundred seventy-five".