6445431 has 24 divisors (see below), whose sum is σ = 9977760. Its totient is φ = 3995136.

The previous prime is 6445409. The next prime is 6445433. The reversal of 6445431 is 1345446.

It is not a de Polignac number, because 6445431 - 2¹¹ = 6443383 is a prime.

It is a super-2 number, since 2×6445431² = 83087161551522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6445395 and 6445404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15555 + ... + 15963.

It is an arithmetic number, because the mean of its divisors is an integer number (415740).

Almost surely, 2^6445431 is an apocalyptic number.

6445431 is a deficient number, since it is larger than the sum of its proper divisors (3532329).

6445431 is a wasteful number, since it uses less digits than its factorization.

6445431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 532 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 6445431 is about 2538.7853394882. The cubic root of 6445431 is about 186.1018346275.

The spelling of 6445431 in words is "six million, four hundred forty-five thousand, four hundred thirty-one".