72521548 has 12 divisors (see below), whose sum is σ = 138450312. Its totient is φ = 32964320.

The previous prime is 72521531. The next prime is 72521549. The reversal of 72521548 is 84512527.

It is a happy 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 3 ways as a sum of consecutive naturals, for example, 824065 + ... + 824152.

It is an arithmetic number, because the mean of its divisors is an integer number (11537526).

Almost surely, 2^72521548 is an apocalyptic number.

It is an amenable number.

72521548 is a deficient number, since it is larger than the sum of its proper divisors (65928764).

72521548 is a wasteful number, since it uses less digits than its factorization.

72521548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648232 (or 1648230 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 72521548 is about 8515.9584310869. The cubic root of 72521548 is about 417.0188521708.

The spelling of 72521548 in words is "seventy-two million, five hundred twenty-one thousand, five hundred forty-eight".