725556745 has 4 divisors (see below), whose sum is σ = 870668100. Its totient is φ = 580445392.

The previous prime is 725556707. The next prime is 725556761. The reversal of 725556745 is 547655527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547655527 = 17 ⋅32215031.

It can be written as a sum of positive squares in 2 ways, for example, as 263607696 + 461949049 = 16236^2 + 21493^2 .

It is a cyclic number.

It is not a de Polignac number, because 725556745 - 2¹³ = 725548553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 725556695 and 725556704.

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, 72555670 + ... + 72555679.

It is an arithmetic number, because the mean of its divisors is an integer number (217667025).

Almost surely, 2^725556745 is an apocalyptic number.

It is an amenable number.

725556745 is a deficient number, since it is larger than the sum of its proper divisors (145111355).

725556745 is a wasteful number, since it uses less digits than its factorization.

725556745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145111354.

The product of its digits is 1470000, while the sum is 46.

The square root of 725556745 is about 26936.1605467446. The cubic root of 725556745 is about 898.5807858447.

It can be divided in two parts, 7255 and 56745, that added together give a cube (64000 = 40³).

The spelling of 725556745 in words is "seven hundred twenty-five million, five hundred fifty-six thousand, seven hundred forty-five".