72805325 has 6 divisors (see below), whose sum is σ = 90278634. Its totient is φ = 58244240.

The previous prime is 72805319. The next prime is 72805331. The reversal of 72805325 is 52350827.

It is an interprime number because it is at equal distance from previous prime (72805319) and next prime (72805331).

It can be written as a sum of positive squares in 3 ways, for example, as 249001 + 72556324 = 499^2 + 8518^2 .

It is not a de Polignac number, because 72805325 - 2¹⁰ = 72804301 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72805291 and 72805300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1456082 + ... + 1456131.

It is an arithmetic number, because the mean of its divisors is an integer number (15046439).

Almost surely, 2^72805325 is an apocalyptic number.

It is an amenable number.

72805325 is a deficient number, since it is larger than the sum of its proper divisors (17473309).

72805325 is a wasteful number, since it uses less digits than its factorization.

72805325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2912223 (or 2912218 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 72805325 is about 8532.6036471877. The cubic root of 72805325 is about 417.5620761797.

The spelling of 72805325 in words is "seventy-two million, eight hundred five thousand, three hundred twenty-five".