72096521 has 4 divisors (see below), whose sum is σ = 82396032. Its totient is φ = 61797012.

The previous prime is 72096517. The next prime is 72096529. The reversal of 72096521 is 12569027.

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.

It is a cyclic number.

It is not a de Polignac number, because 72096521 - 2² = 72096517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72096529) 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, 5149745 + ... + 5149758.

It is an arithmetic number, because the mean of its divisors is an integer number (20599008).

Almost surely, 2^72096521 is an apocalyptic number.

It is an amenable number.

72096521 is a deficient number, since it is larger than the sum of its proper divisors (10299511).

72096521 is a wasteful number, since it uses less digits than its factorization.

72096521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10299510.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 72096521 is about 8490.9670238436. The cubic root of 72096521 is about 416.2025813893.

The spelling of 72096521 in words is "seventy-two million, ninety-six thousand, five hundred twenty-one".