725321775 has 24 divisors (see below), whose sum is σ = 1228452624. Its totient is φ = 377401600.

The previous prime is 725321771. The next prime is 725321791. The reversal of 725321775 is 577123527.

It is not a de Polignac number, because 725321775 - 2² = 725321771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725321771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114864 + ... + 121013.

It is an arithmetic number, because the mean of its divisors is an integer number (51185526).

Almost surely, 2^725321775 is an apocalyptic number.

725321775 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

725321775 is a deficient number, since it is larger than the sum of its proper divisors (503130849).

725321775 is a wasteful number, since it uses less digits than its factorization.

725321775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235931 (or 235926 counting only the distinct ones).

The product of its digits is 102900, while the sum is 39.

The square root of 725321775 is about 26931.7985845728. The cubic root of 725321775 is about 898.4837742165.

The spelling of 725321775 in words is "seven hundred twenty-five million, three hundred twenty-one thousand, seven hundred seventy-five".