72406425 has 72 divisors (see below), whose sum is σ = 148782144. Its totient is φ = 30257280.

The previous prime is 72406403. The next prime is 72406429. The reversal of 72406425 is 52460427.

It is not a de Polignac number, because 72406425 - 2⁹ = 72405913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72406392 and 72406401.

It is not an unprimeable number, because it can be changed into a prime (72406429) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 702924 + ... + 703026.

Almost surely, 2^72406425 is an apocalyptic number.

72406425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72406425 is an abundant number, since it is smaller than the sum of its proper divisors (76375719).

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

72406425 is a wasteful number, since it uses less digits than its factorization.

72406425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 72406425 is about 8509.1964955570. The cubic root of 72406425 is about 416.7980723315.

The spelling of 72406425 in words is "seventy-two million, four hundred six thousand, four hundred twenty-five".