72871505 has 16 divisors (see below), whose sum is σ = 100498944. Its totient is φ = 49688640.

The previous prime is 72871493. The next prime is 72871511. The reversal of 72871505 is 50517827.

It is not a de Polignac number, because 72871505 - 2¹² = 72867409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (6281184).

Almost surely, 2^72871505 is an apocalyptic number.

It is an amenable number.

72871505 is a deficient number, since it is larger than the sum of its proper divisors (27627439).

72871505 is a wasteful number, since it uses less digits than its factorization.

72871505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11696.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 72871505 is about 8536.4808322868. The cubic root of 72871505 is about 417.6885590950.

The spelling of 72871505 in words is "seventy-two million, eight hundred seventy-one thousand, five hundred five".