72651225 has 24 divisors (see below), whose sum is σ = 121232320. Its totient is φ = 38387520.

The previous prime is 72651211. The next prime is 72651233. The reversal of 72651225 is 52215627.

It is a de Polignac number, because none of the positive numbers 2^k-72651225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72651192 and 72651201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3732 + ... + 12618.

Almost surely, 2^72651225 is an apocalyptic number.

72651225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72651225 is a deficient number, since it is larger than the sum of its proper divisors (48581095).

72651225 is a wasteful number, since it uses less digits than its factorization.

72651225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9009 (or 9004 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 72651225 is about 8523.5687948183. The cubic root of 72651225 is about 417.2672636417.

The spelling of 72651225 in words is "seventy-two million, six hundred fifty-one thousand, two hundred twenty-five".