978425 has 12 divisors (see below), whose sum is σ = 1386816. Its totient is φ = 670800.

The previous prime is 978413. The next prime is 978427. The reversal of 978425 is 524879.

It is a happy number.

It is not a de Polignac number, because 978425 - 2¹² = 974329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978425.

It is not an unprimeable number, because it can be changed into a prime (978427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2621 + ... + 2970.

It is an arithmetic number, because the mean of its divisors is an integer number (115568).

2⁹⁷⁸⁴²⁵ is an apocalyptic number.

It is an amenable number.

978425 is a deficient number, since it is larger than the sum of its proper divisors (408391).

978425 is a wasteful number, since it uses less digits than its factorization.

978425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5608 (or 5603 counting only the distinct ones).

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

The square root of 978425 is about 989.1536786567. The cubic root of 978425 is about 99.2755984281.

The spelling of 978425 in words is "nine hundred seventy-eight thousand, four hundred twenty-five".