6445100 has 18 divisors (see below), whose sum is σ = 13986084. Its totient is φ = 2578000.

The previous prime is 6445099. The next prime is 6445147. The reversal of 6445100 is 15446.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 32126 + ... + 32325.

Almost surely, 2^6445100 is an apocalyptic number.

It is an amenable number.

6445100 is an abundant number, since it is smaller than the sum of its proper divisors (7540984).

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

6445100 is a wasteful number, since it uses less digits than its factorization.

6445100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64465 (or 64458 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 6445100 is about 2538.7201499968. The cubic root of 6445100 is about 186.0986488689.

The spelling of 6445100 in words is "six million, four hundred forty-five thousand, one hundred".