725418 has 24 divisors (see below), whose sum is σ = 1587456. Its totient is φ = 239400.

The previous prime is 725399. The next prime is 725423. The reversal of 725418 is 814527.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 725391 and 725400.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725418.

It is an unprimeable number.

725418 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3333 + ... + 3543.

It is an arithmetic number, because the mean of its divisors is an integer number (66144).

2⁷²⁵⁴¹⁸ is an apocalyptic number.

725418 is an abundant number, since it is smaller than the sum of its proper divisors (862038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

725418 is a wasteful number, since it uses less digits than its factorization.

725418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 407 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 725418 is about 851.7147409785. The cubic root of 725418 is about 89.8523504987.

It can be divided in two parts, 7 and 25418, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 725418 in words is "seven hundred twenty-five thousand, four hundred eighteen".