72751241 has 2 divisors, whose sum is σ = 72751242. Its totient is φ = 72751240.

The previous prime is 72751229. The next prime is 72751249. The reversal of 72751241 is 14215727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72505225 + 246016 = 8515^2 + 496^2 .

It is a cyclic number.

It is not a de Polignac number, because 72751241 - 2¹⁸ = 72489097 is a prime.

It is not a weakly prime, because it can be changed into another prime (72751249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36375620 + 36375621.

It is an arithmetic number, because the mean of its divisors is an integer number (36375621).

Almost surely, 2^72751241 is an apocalyptic number.

It is an amenable number.

72751241 is a deficient number, since it is larger than the sum of its proper divisors (1).

72751241 is an equidigital number, since it uses as much as digits as its factorization.

72751241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 29.

The square root of 72751241 is about 8529.4338030141. The cubic root of 72751241 is about 417.4586541579.

Adding to 72751241 its reverse (14215727), we get a palindrome (86966968).

The spelling of 72751241 in words is "seventy-two million, seven hundred fifty-one thousand, two hundred forty-one".