72261239 has 8 divisors (see below), whose sum is σ = 75495552. Its totient is φ = 69034680.

The previous prime is 72261197. The next prime is 72261247. The reversal of 72261239 is 93216227.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72261239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72221239) 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, 25592 + ... + 28274.

It is an arithmetic number, because the mean of its divisors is an integer number (9436944).

Almost surely, 2^72261239 is an apocalyptic number.

72261239 is a deficient number, since it is larger than the sum of its proper divisors (3234313).

72261239 is a wasteful number, since it uses less digits than its factorization.

72261239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3877.

The product of its digits is 9072, while the sum is 32.

The square root of 72261239 is about 8500.6610919387. The cubic root of 72261239 is about 416.5193045465.

The spelling of 72261239 in words is "seventy-two million, two hundred sixty-one thousand, two hundred thirty-nine".