72917125 has 8 divisors (see below), whose sum is σ = 91000728. Its totient is φ = 58333600.

The previous prime is 72917123. The next prime is 72917129. The reversal of 72917125 is 52171927.

It can be written as a sum of positive squares in 4 ways, for example, as 2910436 + 70006689 = 1706^2 + 8367^2 .

It is not a de Polignac number, because 72917125 - 2¹ = 72917123 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72917123) 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, 291544 + ... + 291793.

It is an arithmetic number, because the mean of its divisors is an integer number (11375091).

Almost surely, 2^72917125 is an apocalyptic number.

It is an amenable number.

72917125 is a deficient number, since it is larger than the sum of its proper divisors (18083603).

72917125 is an equidigital number, since it uses as much as digits as its factorization.

72917125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583352 (or 583342 counting only the distinct ones).

The product of its digits is 8820, while the sum is 34.

The square root of 72917125 is about 8539.1524755095. The cubic root of 72917125 is about 417.7757032496.

The spelling of 72917125 in words is "seventy-two million, nine hundred seventeen thousand, one hundred twenty-five".