72506015 has 8 divisors (see below), whose sum is σ = 87316368. Its totient is φ = 57798720.

The previous prime is 72505987. The next prime is 72506053. The reversal of 72506015 is 51060527.

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

It is not a de Polignac number, because 72506015 - 2¹⁴ = 72489631 is a prime.

It is a super-2 number, since 2×72506015² = 10514244422360450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 24206 + ... + 27035.

It is an arithmetic number, because the mean of its divisors is an integer number (10914546).

Almost surely, 2^72506015 is an apocalyptic number.

72506015 is a deficient number, since it is larger than the sum of its proper divisors (14810353).

72506015 is a wasteful number, since it uses less digits than its factorization.

72506015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51529.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 72506015 is about 8515.0463885994. The cubic root of 72506015 is about 416.9890770372.

The spelling of 72506015 in words is "seventy-two million, five hundred six thousand, fifteen".