6446945 has 8 divisors (see below), whose sum is σ = 7788480. Its totient is φ = 5122800.

The previous prime is 6446939. The next prime is 6446971. The reversal of 6446945 is 5496446.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6446945 - 2⁴ = 6446929 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6446899 and 6446908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3515 + ... + 5024.

It is an arithmetic number, because the mean of its divisors is an integer number (973560).

Almost surely, 2^6446945 is an apocalyptic number.

It is an amenable number.

6446945 is a deficient number, since it is larger than the sum of its proper divisors (1341535).

6446945 is a wasteful number, since it uses less digits than its factorization.

6446945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8695.

The product of its digits is 103680, while the sum is 38.

The square root of 6446945 is about 2539.0834960670. The cubic root of 6446945 is about 186.1164049549.

The spelling of 6446945 in words is "six million, four hundred forty-six thousand, nine hundred forty-five".