6402437 has 4 divisors (see below), whose sum is σ = 6558636. Its totient is φ = 6246240.

The previous prime is 6402433. The next prime is 6402439. The reversal of 6402437 is 7342046.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1522756 + 4879681 = 1234^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 6402437 - 2² = 6402433 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78038 + ... + 78119.

It is an arithmetic number, because the mean of its divisors is an integer number (1639659).

Almost surely, 2^6402437 is an apocalyptic number.

It is an amenable number.

6402437 is a deficient number, since it is larger than the sum of its proper divisors (156199).

6402437 is a wasteful number, since it uses less digits than its factorization.

6402437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156198.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 6402437 is about 2530.3037367083. The cubic root of 6402437 is about 185.6871160873.

The spelling of 6402437 in words is "six million, four hundred two thousand, four hundred thirty-seven".