6445959 has 16 divisors (see below), whose sum is σ = 9744000. Its totient is φ = 3757536.

The previous prime is 6445951. The next prime is 6445961. The reversal of 6445959 is 9595446.

It is a happy number.

It is not a de Polignac number, because 6445959 - 2³ = 6445951 is a prime.

6445959 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6445959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3609 + ... + 5090.

It is an arithmetic number, because the mean of its divisors is an integer number (609000).

Almost surely, 2^6445959 is an apocalyptic number.

6445959 is a deficient number, since it is larger than the sum of its proper divisors (3298041).

6445959 is a wasteful number, since it uses less digits than its factorization.

6445959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8734.

The product of its digits is 194400, while the sum is 42.

The square root of 6445959 is about 2538.8893240943. The cubic root of 6445959 is about 186.1069162161.

The spelling of 6445959 in words is "six million, four hundred forty-five thousand, nine hundred fifty-nine".