672012621 has 24 divisors (see below), whose sum is σ = 1147610880. Its totient is φ = 370764576.

The previous prime is 672012587. The next prime is 672012623. The reversal of 672012621 is 126210276.

672012621 is a `hidden beast` number, since 6 + 7 + 20 + 12 + 621 = 666.

It is not a de Polignac number, because 672012621 - 2¹⁹ = 671488333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672012623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182085 + ... + 185738.

It is an arithmetic number, because the mean of its divisors is an integer number (47817120).

Almost surely, 2^672012621 is an apocalyptic number.

It is an amenable number.

672012621 is a deficient number, since it is larger than the sum of its proper divisors (475598259).

672012621 is a wasteful number, since it uses less digits than its factorization.

672012621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367865 (or 367862 counting only the distinct ones).

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

The square root of 672012621 is about 25923.2062253109. The cubic root of 672012621 is about 875.9093114662.

Adding to 672012621 its reverse (126210276), we get a palindrome (798222897).

The spelling of 672012621 in words is "six hundred seventy-two million, twelve thousand, six hundred twenty-one".