72515487 has 16 divisors (see below), whose sum is σ = 105788160. Its totient is φ = 43819200.

The previous prime is 72515483. The next prime is 72515537. The reversal of 72515487 is 78451527.

It is not a de Polignac number, because 72515487 - 2² = 72515483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72515483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8787 + ... + 14907.

It is an arithmetic number, because the mean of its divisors is an integer number (6611760).

Almost surely, 2^72515487 is an apocalyptic number.

72515487 is a deficient number, since it is larger than the sum of its proper divisors (33272673).

72515487 is a wasteful number, since it uses less digits than its factorization.

72515487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6494.

The product of its digits is 78400, while the sum is 39.

The square root of 72515487 is about 8515.6025623558. The cubic root of 72515487 is about 417.0072343747.

The spelling of 72515487 in words is "seventy-two million, five hundred fifteen thousand, four hundred eighty-seven".