451252646 has 12 divisors (see below), whose sum is σ = 732952332. Its totient is φ = 208270296.

The previous prime is 451252583. The next prime is 451252649. The reversal of 451252646 is 646252154.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451252649) 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, 667196 + ... + 667871.

It is an arithmetic number, because the mean of its divisors is an integer number (61079361).

Almost surely, 2^451252646 is an apocalyptic number.

451252646 is a deficient number, since it is larger than the sum of its proper divisors (281699686).

451252646 is a wasteful number, since it uses less digits than its factorization.

451252646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335095 (or 1335082 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 451252646 is about 21242.7080665343. The cubic root of 451252646 is about 767.0198213780.

The spelling of 451252646 in words is "four hundred fifty-one million, two hundred fifty-two thousand, six hundred forty-six".