420636951 has 12 divisors (see below), whose sum is σ = 694384912. Its totient is φ = 240363936.

The previous prime is 420636947. The next prime is 420636973. The reversal of 420636951 is 159636024.

It is a happy number.

It is not a de Polignac number, because 420636951 - 2² = 420636947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420632951) 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 11 ways as a sum of consecutive naturals, for example, 3338326 + ... + 3338451.

Almost surely, 2^420636951 is an apocalyptic number.

420636951 is a deficient number, since it is larger than the sum of its proper divisors (273747961).

420636951 is a wasteful number, since it uses less digits than its factorization.

420636951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6676790 (or 6676787 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 420636951 is about 20509.4356577649. The cubic root of 420636951 is about 749.2656224876.

The spelling of 420636951 in words is "four hundred twenty million, six hundred thirty-six thousand, nine hundred fifty-one".