72501020 has 12 divisors (see below), whose sum is σ = 152252184. Its totient is φ = 29000400.

The previous prime is 72500983. The next prime is 72501041. The reversal of 72501020 is 2010527.

It is a self number, because there is not a number n which added to its sum of digits gives 72501020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1812506 + ... + 1812545.

It is an arithmetic number, because the mean of its divisors is an integer number (12687682).

Almost surely, 2^72501020 is an apocalyptic number.

It is an amenable number.

72501020 is an abundant number, since it is smaller than the sum of its proper divisors (79751164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72501020 is a wasteful number, since it uses less digits than its factorization.

72501020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3625060 (or 3625058 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 72501020 is about 8514.7530792149. The cubic root of 72501020 is about 416.9795012419.

Adding to 72501020 its reverse (2010527), we get a palindrome (74511547).

The spelling of 72501020 in words is "seventy-two million, five hundred one thousand, twenty".