72072621 has 12 divisors (see below), whose sum is σ = 104195520. Its totient is φ = 48006600.

The previous prime is 72072607. The next prime is 72072631. The reversal of 72072621 is 12627027.

It is not a de Polignac number, because 72072621 - 2¹¹ = 72070573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72072631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10300 + ... + 15818.

It is an arithmetic number, because the mean of its divisors is an integer number (8682960).

Almost surely, 2^72072621 is an apocalyptic number.

It is an amenable number.

72072621 is a deficient number, since it is larger than the sum of its proper divisors (32122899).

72072621 is a wasteful number, since it uses less digits than its factorization.

72072621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6976 (or 6973 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 72072621 is about 8489.5595292100. The cubic root of 72072621 is about 416.1565859149.

Adding to 72072621 its reverse (12627027), we get a palindrome (84699648).

The spelling of 72072621 in words is "seventy-two million, seventy-two thousand, six hundred twenty-one".