72585251 has 4 divisors (see below), whose sum is σ = 72602904. Its totient is φ = 72567600.

The previous prime is 72585239. The next prime is 72585277. The reversal of 72585251 is 15258527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15258527 = 521 ⋅29287.

It is a cyclic number.

It is not a de Polignac number, because 72585251 - 2¹⁸ = 72323107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72585221) 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, 956 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (18150726).

Almost surely, 2^72585251 is an apocalyptic number.

72585251 is a deficient number, since it is larger than the sum of its proper divisors (17653).

72585251 is a wasteful number, since it uses less digits than its factorization.

72585251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17652.

The product of its digits is 28000, while the sum is 35.

The square root of 72585251 is about 8519.6978232799. The cubic root of 72585251 is about 417.1409196947.

The spelling of 72585251 in words is "seventy-two million, five hundred eighty-five thousand, two hundred fifty-one".