6440951 has 6 divisors (see below), whose sum is σ = 7079856. Its totient is φ = 5855300.

The previous prime is 6440947. The next prime is 6440953. The reversal of 6440951 is 1590446.

It is not a de Polignac number, because 6440951 - 2² = 6440947 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26495 + ... + 26736.

It is an arithmetic number, because the mean of its divisors is an integer number (1179976).

Almost surely, 2^6440951 is an apocalyptic number.

6440951 is a deficient number, since it is larger than the sum of its proper divisors (638905).

6440951 is a wasteful number, since it uses less digits than its factorization.

6440951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53253 (or 53242 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 6440951 is about 2537.9028744221. The cubic root of 6440951 is about 186.0587069473.

The spelling of 6440951 in words is "six million, four hundred forty thousand, nine hundred fifty-one".