725425 has 6 divisors (see below), whose sum is σ = 899558. Its totient is φ = 580320.

The previous prime is 725423. The next prime is 725437. The reversal of 725425 is 524527.

It can be written as a sum of positive squares in 3 ways, for example, as 4624 + 720801 = 68^2 + 849^2 .

It is not a de Polignac number, because 725425 - 2¹ = 725423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 29017 = 725425 / (7 + 2 + 5 + 4 + 2 + 5).

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 725425.

It is not an unprimeable number, because it can be changed into a prime (725423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14484 + ... + 14533.

2⁷²⁵⁴²⁵ is an apocalyptic number.

It is an amenable number.

725425 is a deficient number, since it is larger than the sum of its proper divisors (174133).

725425 is a wasteful number, since it uses less digits than its factorization.

725425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29027 (or 29022 counting only the distinct ones).

The product of its digits is 2800, while the sum is 25.

The square root of 725425 is about 851.7188503256. The cubic root of 725425 is about 89.8526395111.

The spelling of 725425 in words is "seven hundred twenty-five thousand, four hundred twenty-five".