72406515 has 16 divisors (see below), whose sum is σ = 116157600. Its totient is φ = 38514432.

The previous prime is 72406513. The next prime is 72406517. The reversal of 72406515 is 51560427.

It is an interprime number because it is at equal distance from previous prime (72406513) and next prime (72406517).

It is not a de Polignac number, because 72406515 - 2¹ = 72406513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72406513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370 + ... + 12039.

It is an arithmetic number, because the mean of its divisors is an integer number (7259850).

Almost surely, 2^72406515 is an apocalyptic number.

72406515 is a deficient number, since it is larger than the sum of its proper divisors (43751085).

72406515 is a wasteful number, since it uses less digits than its factorization.

72406515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12806.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 72406515 is about 8509.2017839513. The cubic root of 72406515 is about 416.7982450225.

The spelling of 72406515 in words is "seventy-two million, four hundred six thousand, five hundred fifteen".