72240501 has 8 divisors (see below), whose sum is σ = 96530560. Its totient is φ = 48055392.

The previous prime is 72240481. The next prime is 72240503. The reversal of 72240501 is 10504227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72240501 - 2⁷ = 72240373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72240503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24616 + ... + 27393.

It is an arithmetic number, because the mean of its divisors is an integer number (12066320).

Almost surely, 2^72240501 is an apocalyptic number.

It is an amenable number.

72240501 is a deficient number, since it is larger than the sum of its proper divisors (24290059).

72240501 is a wasteful number, since it uses less digits than its factorization.

72240501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52475.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 72240501 is about 8499.4412169271. The cubic root of 72240501 is about 416.4794555952.

Adding to 72240501 its reverse (10504227), we get a palindrome (82744728).

The spelling of 72240501 in words is "seventy-two million, two hundred forty thousand, five hundred one".