6402025421 has 12 divisors (see below), whose sum is σ = 7059899616. Its totient is φ = 5801031720.

The previous prime is 6402025403. The next prime is 6402025489. The reversal of 6402025421 is 1245202046.

It is a de Polignac number, because none of the positive numbers 2^k-6402025421 is a prime.

It is a super-2 number, since 2×6402025421² = 81971858982260454482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402027421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49025 + ... + 123318.

It is an arithmetic number, because the mean of its divisors is an integer number (588324968).

Almost surely, 2^6402025421 is an apocalyptic number.

It is an amenable number.

6402025421 is a deficient number, since it is larger than the sum of its proper divisors (657874195).

6402025421 is a wasteful number, since it uses less digits than its factorization.

6402025421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172672 (or 172661 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 6402025421 is about 80012.6578798630. The cubic root of 6402025421 is about 1856.8313705271.

Adding to 6402025421 its reverse (1245202046), we get a palindrome (7647227467).

The spelling of 6402025421 in words is "six billion, four hundred two million, twenty-five thousand, four hundred twenty-one".