72414521 has 2 divisors, whose sum is σ = 72414522. Its totient is φ = 72414520.

The previous prime is 72414499. The next prime is 72414539. The reversal of 72414521 is 12541427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69889600 + 2524921 = 8360^2 + 1589^2 .

It is a cyclic number.

It is not a de Polignac number, because 72414521 - 2⁶ = 72414457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72414571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36207260 + 36207261.

It is an arithmetic number, because the mean of its divisors is an integer number (36207261).

Almost surely, 2^72414521 is an apocalyptic number.

It is an amenable number.

72414521 is a deficient number, since it is larger than the sum of its proper divisors (1).

72414521 is an equidigital number, since it uses as much as digits as its factorization.

72414521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 26.

The square root of 72414521 is about 8509.6722028525. The cubic root of 72414521 is about 416.8136062727.

Adding to 72414521 its reverse (12541427), we get a palindrome (84955948).

The spelling of 72414521 in words is "seventy-two million, four hundred fourteen thousand, five hundred twenty-one".