678051 has 20 divisors (see below), whose sum is σ = 1106424. Its totient is φ = 410400.

The previous prime is 678047. The next prime is 678061. The reversal of 678051 is 150876.

It is not a de Polignac number, because 678051 - 2² = 678047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (678061) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 511 + ... + 1271.

2⁶⁷⁸⁰⁵¹ is an apocalyptic number.

678051 is a deficient number, since it is larger than the sum of its proper divisors (428373).

678051 is a wasteful number, since it uses less digits than its factorization.

678051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 678051 is about 823.4385222954. The cubic root of 678051 is about 87.8524991172.

It can be divided in two parts, 67 and 8051, that added together give a palindrome (8118).

The spelling of 678051 in words is "six hundred seventy-eight thousand, fifty-one".