725635 has 8 divisors (see below), whose sum is σ = 879840. Its totient is φ = 574464.

The previous prime is 725603. The next prime is 725639. The reversal of 725635 is 536527.

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

It is a cyclic number.

It is not a de Polignac number, because 725635 - 2⁵ = 725603 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (725639) 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, 190 + ... + 1219.

It is an arithmetic number, because the mean of its divisors is an integer number (109980).

2⁷²⁵⁶³⁵ is an apocalyptic number.

725635 is a deficient number, since it is larger than the sum of its proper divisors (154205).

725635 is a wasteful number, since it uses less digits than its factorization.

725635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517.

The product of its digits is 6300, while the sum is 28.

The square root of 725635 is about 851.8421215225. The cubic root of 725635 is about 89.8613090192.

The spelling of 725635 in words is "seven hundred twenty-five thousand, six hundred thirty-five".