72090241 has 2 divisors, whose sum is σ = 72090242. Its totient is φ = 72090240.

The previous prime is 72090233. The next prime is 72090247. The reversal of 72090241 is 14209027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41796225 + 30294016 = 6465^2 + 5504^2 .

It is a cyclic number.

It is not a de Polignac number, because 72090241 - 2³ = 72090233 is a prime.

It is not a weakly prime, because it can be changed into another prime (72090247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36045120 + 36045121.

It is an arithmetic number, because the mean of its divisors is an integer number (36045121).

Almost surely, 2^72090241 is an apocalyptic number.

It is an amenable number.

72090241 is a deficient number, since it is larger than the sum of its proper divisors (1).

72090241 is an equidigital number, since it uses as much as digits as its factorization.

72090241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 72090241 is about 8490.5972110329. The cubic root of 72090241 is about 416.1904965339.

Adding to 72090241 its reverse (14209027), we get a palindrome (86299268).

The spelling of 72090241 in words is "seventy-two million, ninety thousand, two hundred forty-one".