72597505 has 8 divisors (see below), whose sum is σ = 89927424. Its totient is φ = 56204400.

The previous prime is 72597479. The next prime is 72597509. The reversal of 72597505 is 50579527.

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

It is not a de Polignac number, because 72597505 - 2²³ = 64208897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72597509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234031 + ... + 234340.

It is an arithmetic number, because the mean of its divisors is an integer number (11240928).

It is a Proth number, since it is equal to 4431 ⋅ 2¹⁴ + 1 and 4431 < 2¹⁴.

Almost surely, 2^72597505 is an apocalyptic number.

It is an amenable number.

72597505 is a deficient number, since it is larger than the sum of its proper divisors (17329919).

72597505 is a wasteful number, since it uses less digits than its factorization.

72597505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468407.

The product of its (nonzero) digits is 110250, while the sum is 40.

The square root of 72597505 is about 8520.4169498916. The cubic root of 72597505 is about 417.1643925864.

The spelling of 72597505 in words is "seventy-two million, five hundred ninety-seven thousand, five hundred five".