72521589 has 8 divisors (see below), whose sum is σ = 110509120. Its totient is φ = 41440896.

The previous prime is 72521569. The next prime is 72521621. The reversal of 72521589 is 98512527.

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

It is not a de Polignac number, because 72521589 - 2⁵ = 72521557 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 (72521549) 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, 1726684 + ... + 1726725.

It is an arithmetic number, because the mean of its divisors is an integer number (13813640).

Almost surely, 2^72521589 is an apocalyptic number.

It is an amenable number.

72521589 is a deficient number, since it is larger than the sum of its proper divisors (37987531).

72521589 is a wasteful number, since it uses less digits than its factorization.

72521589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453419.

The product of its digits is 50400, while the sum is 39.

The square root of 72521589 is about 8515.9608383317. The cubic root of 72521589 is about 417.0189307579.

The spelling of 72521589 in words is "seventy-two million, five hundred twenty-one thousand, five hundred eighty-nine".