72345425 has 12 divisors (see below), whose sum is σ = 90505740. Its totient is φ = 57361920.

The previous prime is 72345367. The next prime is 72345439. The reversal of 72345425 is 52454327.

It can be written as a sum of positive squares in 6 ways, for example, as 638401 + 71707024 = 799^2 + 8468^2 .

It is a de Polignac number, because none of the positive numbers 2^k-72345425 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 72345391 and 72345400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9980 + ... + 15629.

It is an arithmetic number, because the mean of its divisors is an integer number (7542145).

Almost surely, 2^72345425 is an apocalyptic number.

It is an amenable number.

72345425 is a deficient number, since it is larger than the sum of its proper divisors (18160315).

72345425 is a wasteful number, since it uses less digits than its factorization.

72345425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25732 (or 25727 counting only the distinct ones).

The product of its digits is 33600, while the sum is 32.

The square root of 72345425 is about 8505.6113830812. The cubic root of 72345425 is about 416.6809932852.

It can be divided in two parts, 7 and 2345425, that added together give a palindrome (2345432).

The spelling of 72345425 in words is "seventy-two million, three hundred forty-five thousand, four hundred twenty-five".