725978 has 8 divisors (see below), whose sum is σ = 1188000. Its totient is φ = 329980.

The previous prime is 725953. The next prime is 725981. The reversal of 725978 is 879527.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16478 + ... + 16521.

It is an arithmetic number, because the mean of its divisors is an integer number (148500).

2⁷²⁵⁹⁷⁸ is an apocalyptic number.

725978 is a deficient number, since it is larger than the sum of its proper divisors (462022).

725978 is a wasteful number, since it uses less digits than its factorization.

725978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33012.

The product of its digits is 35280, while the sum is 38.

The square root of 725978 is about 852.0434261233. The cubic root of 725978 is about 89.8754656194.

It can be divided in two parts, 7259 and 78, that added together give a palindrome (7337).

The spelling of 725978 in words is "seven hundred twenty-five thousand, nine hundred seventy-eight".