72251237 has 2 divisors, whose sum is σ = 72251238. Its totient is φ = 72251236.

The previous prime is 72251213. The next prime is 72251273. The reversal of 72251237 is 73215227.

Together with next prime (72251273) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70576801 + 1674436 = 8401^2 + 1294^2 .

It is a cyclic number.

It is not a de Polignac number, because 72251237 - 2²⁰ = 71202661 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 (72250237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36125618 + 36125619.

It is an arithmetic number, because the mean of its divisors is an integer number (36125619).

Almost surely, 2^72251237 is an apocalyptic number.

It is an amenable number.

72251237 is a deficient number, since it is larger than the sum of its proper divisors (1).

72251237 is an equidigital number, since it uses as much as digits as its factorization.

72251237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 29.

The square root of 72251237 is about 8500.0727643944. The cubic root of 72251237 is about 416.5000862290.

The spelling of 72251237 in words is "seventy-two million, two hundred fifty-one thousand, two hundred thirty-seven".