425978 has 8 divisors (see below), whose sum is σ = 730272. Its totient is φ = 182556.

The previous prime is 425977. The next prime is 425987. The reversal of 425978 is 879524.

It is a happy number.

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

It is a Curzon number.

It is a zygodrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 425978.

It is not an unprimeable number, because it can be changed into a prime (425977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15200 + ... + 15227.

It is an arithmetic number, because the mean of its divisors is an integer number (91284).

2⁴²⁵⁹⁷⁸ is an apocalyptic number.

425978 is a deficient number, since it is larger than the sum of its proper divisors (304294).

425978 is a wasteful number, since it uses less digits than its factorization.

425978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30436.

The product of its digits is 20160, while the sum is 35.

The square root of 425978 is about 652.6699012518. The cubic root of 425978 is about 75.2423567400.

The spelling of 425978 in words is "four hundred twenty-five thousand, nine hundred seventy-eight".