72415241 has 2 divisors, whose sum is σ = 72415242. Its totient is φ = 72415240.

The previous prime is 72415219. The next prime is 72415249. The reversal of 72415241 is 14251427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39639616 + 32775625 = 6296^2 + 5725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72415241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72415241.

It is not a weakly prime, because it can be changed into another prime (72415249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36207620 + 36207621.

It is an arithmetic number, because the mean of its divisors is an integer number (36207621).

Almost surely, 2^72415241 is an apocalyptic number.

It is an amenable number.

72415241 is a deficient number, since it is larger than the sum of its proper divisors (1).

72415241 is an equidigital number, since it uses as much as digits as its factorization.

72415241 is an evil number, because the sum of its binary digits is even.

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

The square root of 72415241 is about 8509.7145075496. The cubic root of 72415241 is about 416.8149876936.

Adding to 72415241 its reverse (14251427), we get a palindrome (86666668).

The spelling of 72415241 in words is "seventy-two million, four hundred fifteen thousand, two hundred forty-one".