72405241 has 4 divisors (see below), whose sum is σ = 72422800. Its totient is φ = 72387684.

The previous prime is 72405233. The next prime is 72405247. The reversal of 72405241 is 14250427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72405241 - 2³ = 72405233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72405247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150 + ... + 12088.

It is an arithmetic number, because the mean of its divisors is an integer number (18105700).

Almost surely, 2^72405241 is an apocalyptic number.

It is an amenable number.

72405241 is a deficient number, since it is larger than the sum of its proper divisors (17559).

72405241 is a wasteful number, since it uses less digits than its factorization.

72405241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17558.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 72405241 is about 8509.1269234863. The cubic root of 72405241 is about 416.7958004723.

Adding to 72405241 its reverse (14250427), we get a palindrome (86655668).

The spelling of 72405241 in words is "seventy-two million, four hundred five thousand, two hundred forty-one".