72252461 has 2 divisors, whose sum is σ = 72252462. Its totient is φ = 72252460.

The previous prime is 72252437. The next prime is 72252469. The reversal of 72252461 is 16425227.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56100100 + 16152361 = 7490^2 + 4019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72252461 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 (72252469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36126230 + 36126231.

It is an arithmetic number, because the mean of its divisors is an integer number (36126231).

Almost surely, 2^72252461 is an apocalyptic number.

It is an amenable number.

72252461 is a deficient number, since it is larger than the sum of its proper divisors (1).

72252461 is an equidigital number, since it uses as much as digits as its factorization.

72252461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 72252461 is about 8500.1447634731. The cubic root of 72252461 is about 416.5024381759.

Adding to 72252461 its reverse (16425227), we get a palindrome (88677688).

The spelling of 72252461 in words is "seventy-two million, two hundred fifty-two thousand, four hundred sixty-one".