72572261 has 8 divisors (see below), whose sum is σ = 74758464. Its totient is φ = 70408800.

The previous prime is 72572257. The next prime is 72572263. The reversal of 72572261 is 16227527.

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 72572261 - 2² = 72572257 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 (72572263) 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, 905 + ... + 12081.

It is an arithmetic number, because the mean of its divisors is an integer number (9344808).

Almost surely, 2^72572261 is an apocalyptic number.

It is an amenable number.

72572261 is a deficient number, since it is larger than the sum of its proper divisors (2186203).

72572261 is a wasteful number, since it uses less digits than its factorization.

72572261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11371.

The product of its digits is 11760, while the sum is 32.

The square root of 72572261 is about 8518.9354381871. The cubic root of 72572261 is about 417.1160340890.

Adding to 72572261 its reverse (16227527), we get a palindrome (88799788).

The spelling of 72572261 in words is "seventy-two million, five hundred seventy-two thousand, two hundred sixty-one".