672431121 has 24 divisors (see below), whose sum is σ = 996525504. Its totient is φ = 436779360.

The previous prime is 672431117. The next prime is 672431129. The reversal of 672431121 is 121134276.

It is not a de Polignac number, because 672431121 - 2² = 672431117 is a prime.

It is a super-2 number, since 2×672431121² = 904327224978633282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (672431129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53020 + ... + 64466.

It is an arithmetic number, because the mean of its divisors is an integer number (41521896).

Almost surely, 2^672431121 is an apocalyptic number.

672431121 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

672431121 is a deficient number, since it is larger than the sum of its proper divisors (324094383).

672431121 is a wasteful number, since it uses less digits than its factorization.

672431121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11621 (or 11618 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 672431121 is about 25931.2768871878. The cubic root of 672431121 is about 876.0910997082.

Adding to 672431121 its reverse (121134276), we get a palindrome (793565397).

The spelling of 672431121 in words is "six hundred seventy-two million, four hundred thirty-one thousand, one hundred twenty-one".