72425405 has 16 divisors (see below), whose sum is σ = 93837744. Its totient is φ = 53345280.

The previous prime is 72425371. The next prime is 72425477. The reversal of 72425405 is 50452427.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 158404 + 72267001 = 398^2 + 8501^2 .

It is not a de Polignac number, because 72425405 - 2²⁴ = 55648189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28757 + ... + 31173.

It is an arithmetic number, because the mean of its divisors is an integer number (5864859).

Almost surely, 2^72425405 is an apocalyptic number.

It is an amenable number.

72425405 is a deficient number, since it is larger than the sum of its proper divisors (21412339).

72425405 is a wasteful number, since it uses less digits than its factorization.

72425405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2896.

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 72425405 is about 8510.3116864190. The cubic root of 72425405 is about 416.8344877753.

The spelling of 72425405 in words is "seventy-two million, four hundred twenty-five thousand, four hundred five".