72240241 has 2 divisors, whose sum is σ = 72240242. Its totient is φ = 72240240.

The previous prime is 72240187. The next prime is 72240251. The reversal of 72240241 is 14204227.

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., 49056016 + 23184225 = 7004^2 + 4815^2 .

It is a cyclic number.

It is not a de Polignac number, because 72240241 - 2²⁵ = 38685809 is a prime.

It is equal to p_4242073 and since 72240241 and 4242073 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (72240251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36120120 + 36120121.

It is an arithmetic number, because the mean of its divisors is an integer number (36120121).

Almost surely, 2^72240241 is an apocalyptic number.

It is an amenable number.

72240241 is a deficient number, since it is larger than the sum of its proper divisors (1).

72240241 is an equidigital number, since it uses as much as digits as its factorization.

72240241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 72240241 is about 8499.4259217902. The cubic root of 72240241 is about 416.4789559457.

Adding to 72240241 its reverse (14204227), we get a palindrome (86444468).

The spelling of 72240241 in words is "seventy-two million, two hundred forty thousand, two hundred forty-one".