72130261 has 8 divisors (see below), whose sum is σ = 83251584. Its totient is φ = 61213200.

The previous prime is 72130229. The next prime is 72130283. The reversal of 72130261 is 16203127.

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

It is a cyclic number.

It is not a de Polignac number, because 72130261 - 2⁵ = 72130229 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 (72130291) 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, 50305 + ... + 51718.

It is an arithmetic number, because the mean of its divisors is an integer number (10406448).

Almost surely, 2^72130261 is an apocalyptic number.

It is an amenable number.

72130261 is a deficient number, since it is larger than the sum of its proper divisors (11121323).

72130261 is a wasteful number, since it uses less digits than its factorization.

72130261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102131.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 72130261 is about 8492.9536087276. The cubic root of 72130261 is about 416.2674966117.

Adding to 72130261 its reverse (16203127), we get a palindrome (88333388).

The spelling of 72130261 in words is "seventy-two million, one hundred thirty thousand, two hundred sixty-one".