72071725 has 12 divisors (see below), whose sum is σ = 97493760. Its totient is φ = 52415600.

The previous prime is 72071711. The next prime is 72071729. The reversal of 72071725 is 52717027.

It is a de Polignac number, because none of the positive numbers 2^k-72071725 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72071729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130765 + ... + 131314.

It is an arithmetic number, because the mean of its divisors is an integer number (8124480).

Almost surely, 2^72071725 is an apocalyptic number.

It is an amenable number.

72071725 is a deficient number, since it is larger than the sum of its proper divisors (25422035).

72071725 is a wasteful number, since it uses less digits than its factorization.

72071725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262100 (or 262095 counting only the distinct ones).

The product of its (nonzero) digits is 6860, while the sum is 31.

The square root of 72071725 is about 8489.5067583459. The cubic root of 72071725 is about 416.1548613680.

The spelling of 72071725 in words is "seventy-two million, seventy-one thousand, seven hundred twenty-five".