6402534 has 12 divisors (see below), whose sum is σ = 12817476. Its totient is φ = 2132112.

The previous prime is 6402527. The next prime is 6402541. The reversal of 6402534 is 4352046.

It is an interprime number because it is at equal distance from previous prime (6402527) and next prime (6402541).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5682 + ... + 6714.

It is an arithmetic number, because the mean of its divisors is an integer number (1068123).

Almost surely, 2^6402534 is an apocalyptic number.

6402534 is an abundant number, since it is smaller than the sum of its proper divisors (6414942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6402534 is an equidigital number, since it uses as much as digits as its factorization.

6402534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 6402534 is about 2530.3229042950. The cubic root of 6402534 is about 185.6880538323.

Multiplying 6402534 by its sum of digits (24), we get a square (153660816 = 12396²).

The spelling of 6402534 in words is "six million, four hundred two thousand, five hundred thirty-four".