72624121 has 4 divisors (see below), whose sum is σ = 73004544. Its totient is φ = 72243700.

The previous prime is 72624109. The next prime is 72624143. The reversal of 72624121 is 12142627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72624121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72624421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189925 + ... + 190306.

It is an arithmetic number, because the mean of its divisors is an integer number (18251136).

Almost surely, 2^72624121 is an apocalyptic number.

It is an amenable number.

72624121 is a deficient number, since it is larger than the sum of its proper divisors (380423).

72624121 is a wasteful number, since it uses less digits than its factorization.

72624121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380422.

The product of its digits is 1344, while the sum is 25.

The square root of 72624121 is about 8521.9787021560. The cubic root of 72624121 is about 417.2153672071.

Adding to 72624121 its reverse (12142627), we get a palindrome (84766748).

The spelling of 72624121 in words is "seventy-two million, six hundred twenty-four thousand, one hundred twenty-one".