72410621 has 2 divisors, whose sum is σ = 72410622. Its totient is φ = 72410620.

The previous prime is 72410617. The next prime is 72410627. The reversal of 72410621 is 12601427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43099225 + 29311396 = 6565^2 + 5414^2 .

It is a cyclic number.

It is not a de Polignac number, because 72410621 - 2² = 72410617 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72410627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36205310 + 36205311.

It is an arithmetic number, because the mean of its divisors is an integer number (36205311).

Almost surely, 2^72410621 is an apocalyptic number.

It is an amenable number.

72410621 is a deficient number, since it is larger than the sum of its proper divisors (1).

72410621 is an equidigital number, since it uses as much as digits as its factorization.

72410621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 72410621 is about 8509.4430487547. The cubic root of 72410621 is about 416.8061234169.

The spelling of 72410621 in words is "seventy-two million, four hundred ten thousand, six hundred twenty-one".