6445004 has 6 divisors (see below), whose sum is σ = 11278764. Its totient is φ = 3222500.

The previous prime is 6445003. The next prime is 6445051. The reversal of 6445004 is 4005446.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6445003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805622 + ... + 805629.

It is an arithmetic number, because the mean of its divisors is an integer number (1879794).

Almost surely, 2^6445004 is an apocalyptic number.

It is an amenable number.

6445004 is a deficient number, since it is larger than the sum of its proper divisors (4833760).

6445004 is a wasteful number, since it uses less digits than its factorization.

6445004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611255 (or 1611253 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 6445004 is about 2538.7012427617. The cubic root of 6445004 is about 186.0977248823.

The spelling of 6445004 in words is "six million, four hundred forty-five thousand, four".