72517130 has 16 divisors (see below), whose sum is σ = 149178240. Its totient is φ = 24862992.

The previous prime is 72517097. The next prime is 72517169. The reversal of 72517130 is 3171527.

It is a self number, because there is not a number n which added to its sum of digits gives 72517130.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517910 + ... + 518049.

It is an arithmetic number, because the mean of its divisors is an integer number (9323640).

Almost surely, 2^72517130 is an apocalyptic number.

72517130 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72517130 is an abundant number, since it is smaller than the sum of its proper divisors (76661110).

72517130 is a wasteful number, since it uses less digits than its factorization.

72517130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035973.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 72517130 is about 8515.6990317883. The cubic root of 72517130 is about 417.0103837604.

Adding to 72517130 its reverse (3171527), we get a palindrome (75688657).

The spelling of 72517130 in words is "seventy-two million, five hundred seventeen thousand, one hundred thirty".