678025 has 12 divisors (see below), whose sum is σ = 864652. Its totient is φ = 527040.

The previous prime is 678023. The next prime is 678037. The reversal of 678025 is 520876.

It can be written as a sum of positive squares in 6 ways, for example, as 104976 + 573049 = 324^2 + 757^2 .

It is not a de Polignac number, because 678025 - 2¹ = 678023 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 677984 and 678002.

It is not an unprimeable number, because it can be changed into a prime (678023) 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, 559 + ... + 1291.

2⁶⁷⁸⁰²⁵ is an apocalyptic number.

It is an amenable number.

678025 is a deficient number, since it is larger than the sum of its proper divisors (186627).

678025 is a wasteful number, since it uses less digits than its factorization.

678025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 678025 is about 823.4227346874. The cubic root of 678025 is about 87.8513761957.

The spelling of 678025 in words is "six hundred seventy-eight thousand, twenty-five".