6430945 has 4 divisors (see below), whose sum is σ = 7717140. Its totient is φ = 5144752.

The previous prime is 6430937. The next prime is 6430969. The reversal of 6430945 is 5490346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4910656 + 1520289 = 2216^2 + 1233^2 .

It is a cyclic number.

It is not a de Polignac number, because 6430945 - 2³ = 6430937 is a prime.

6430945 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643090 + ... + 643099.

It is an arithmetic number, because the mean of its divisors is an integer number (1929285).

Almost surely, 2^6430945 is an apocalyptic number.

It is an amenable number.

6430945 is a deficient number, since it is larger than the sum of its proper divisors (1286195).

6430945 is a wasteful number, since it uses less digits than its factorization.

6430945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286194.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 6430945 is about 2535.9307955857. The cubic root of 6430945 is about 185.9623097794.

The spelling of 6430945 in words is "six million, four hundred thirty thousand, nine hundred forty-five".