725877505 has 4 divisors (see below), whose sum is σ = 871053012. Its totient is φ = 580702000.

The previous prime is 725877499. The next prime is 725877521. The reversal of 725877505 is 505778527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505778527 = 2311 ⋅218857.

It can be written as a sum of positive squares in 2 ways, for example, as 202749121 + 523128384 = 14239^2 + 22872^2 .

It is not a de Polignac number, because 725877505 - 2³ = 725877497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72587746 + ... + 72587755.

It is an arithmetic number, because the mean of its divisors is an integer number (217763253).

Almost surely, 2^725877505 is an apocalyptic number.

It is an amenable number.

725877505 is a deficient number, since it is larger than the sum of its proper divisors (145175507).

725877505 is a wasteful number, since it uses less digits than its factorization.

725877505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145175506.

The product of its (nonzero) digits is 686000, while the sum is 46.

The square root of 725877505 is about 26942.1139667993. The cubic root of 725877505 is about 898.7131836258.

The spelling of 725877505 in words is "seven hundred twenty-five million, eight hundred seventy-seven thousand, five hundred five".