6405970 has 16 divisors (see below), whose sum is σ = 11634840. Its totient is φ = 2539264.

The previous prime is 6405943. The next prime is 6405979. The reversal of 6405970 is 795046.

It can be written as a sum of positive squares in 4 ways, for example, as 2313441 + 4092529 = 1521^2 + 2023^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405979) 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 7 ways as a sum of consecutive naturals, for example, 1705 + ... + 3964.

Almost surely, 2^6405970 is an apocalyptic number.

6405970 is a deficient number, since it is larger than the sum of its proper divisors (5228870).

6405970 is a wasteful number, since it uses less digits than its factorization.

6405970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5789.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 6405970 is about 2531.0017779528. The cubic root of 6405970 is about 185.7212651646.

The spelling of 6405970 in words is "six million, four hundred five thousand, nine hundred seventy".