6401975 has 6 divisors (see below), whose sum is σ = 7938480. Its totient is φ = 5121560.

The previous prime is 6401971. The next prime is 6401977. The reversal of 6401975 is 5791046.

It is a happy number.

It is not a de Polignac number, because 6401975 - 2² = 6401971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128015 + ... + 128064.

It is an arithmetic number, because the mean of its divisors is an integer number (1323080).

Almost surely, 2^6401975 is an apocalyptic number.

6401975 is a deficient number, since it is larger than the sum of its proper divisors (1536505).

6401975 is a wasteful number, since it uses less digits than its factorization.

6401975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256089 (or 256084 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 6401975 is about 2530.2124416736. The cubic root of 6401975 is about 185.6826495844.

The spelling of 6401975 in words is "six million, four hundred one thousand, nine hundred seventy-five".