72245297 has 2 divisors, whose sum is σ = 72245298. Its totient is φ = 72245296.

The previous prime is 72245287. The next prime is 72245357. The reversal of 72245297 is 79254227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67387681 + 4857616 = 8209^2 + 2204^2 .

It is a cyclic number.

It is not a de Polignac number, because 72245297 - 2⁶ = 72245233 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72245297.

It is not a weakly prime, because it can be changed into another prime (72245207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36122648 + 36122649.

It is an arithmetic number, because the mean of its divisors is an integer number (36122649).

Almost surely, 2^72245297 is an apocalyptic number.

It is an amenable number.

72245297 is a deficient number, since it is larger than the sum of its proper divisors (1).

72245297 is an equidigital number, since it uses as much as digits as its factorization.

72245297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 72245297 is about 8499.7233484391. The cubic root of 72245297 is about 416.4886719916.

It can be divided in two parts, 7224 and 5297, that added together give a palindrome (12521).

The spelling of 72245297 in words is "seventy-two million, two hundred forty-five thousand, two hundred ninety-seven".