72952261 has 4 divisors (see below), whose sum is σ = 74188800. Its totient is φ = 71715724.

The previous prime is 72952249. The next prime is 72952291. The reversal of 72952261 is 16225927.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16225927 = 31 ⋅523417.

It is a cyclic number.

It is not a de Polignac number, because 72952261 - 2⁷ = 72952133 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 (72952241) 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, 618181 + ... + 618298.

It is an arithmetic number, because the mean of its divisors is an integer number (18547200).

Almost surely, 2^72952261 is an apocalyptic number.

It is an amenable number.

72952261 is a deficient number, since it is larger than the sum of its proper divisors (1236539).

72952261 is a wasteful number, since it uses less digits than its factorization.

72952261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236538.

The product of its digits is 15120, while the sum is 34.

The square root of 72952261 is about 8541.2095747616. The cubic root of 72952261 is about 417.8427959022.

The spelling of 72952261 in words is "seventy-two million, nine hundred fifty-two thousand, two hundred sixty-one".