72705115 has 16 divisors (see below), whose sum is σ = 104958720. Its totient is φ = 47230560.

The previous prime is 72705103. The next prime is 72705119. The reversal of 72705115 is 51150727.

It is not a de Polignac number, because 72705115 - 2⁷ = 72704987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72705119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54001 + ... + 55330.

It is an arithmetic number, because the mean of its divisors is an integer number (6559920).

Almost surely, 2^72705115 is an apocalyptic number.

72705115 is a deficient number, since it is larger than the sum of its proper divisors (32253605).

72705115 is a wasteful number, since it uses less digits than its factorization.

72705115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109362.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 72705115 is about 8526.7294433446. The cubic root of 72705115 is about 417.3704092997.

The spelling of 72705115 in words is "seventy-two million, seven hundred five thousand, one hundred fifteen".