72505705 has 8 divisors (see below), whose sum is σ = 87092352. Its totient is φ = 57947568.

The previous prime is 72505687. The next prime is 72505711. The reversal of 72505705 is 50750527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72505705 - 2⁵ = 72505673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059 + ... + 12088.

It is an arithmetic number, because the mean of its divisors is an integer number (10886544).

Almost surely, 2^72505705 is an apocalyptic number.

It is an amenable number.

72505705 is a deficient number, since it is larger than the sum of its proper divisors (14586647).

72505705 is a wasteful number, since it uses less digits than its factorization.

72505705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14255.

The product of its (nonzero) digits is 12250, while the sum is 31.

The square root of 72505705 is about 8515.0281855083. The cubic root of 72505705 is about 416.9884827564.

The spelling of 72505705 in words is "seventy-two million, five hundred five thousand, seven hundred five".