851418 has 16 divisors (see below), whose sum is σ = 1892160. Its totient is φ = 283788.

The previous prime is 851413. The next prime is 851419. The reversal of 851418 is 814158.

It is a super-2 number, since 2×851418² = 1449825221448, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 851391 and 851400.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 851418.

It is not an unprimeable number, because it can be changed into a prime (851413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7830 + ... + 7937.

It is an arithmetic number, because the mean of its divisors is an integer number (118260).

2⁸⁵¹⁴¹⁸ is an apocalyptic number.

851418 is an abundant number, since it is smaller than the sum of its proper divisors (1040742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

851418 is a wasteful number, since it uses less digits than its factorization.

851418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15778 (or 15772 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 851418 is about 922.7231437436. The cubic root of 851418 is about 94.7794699975.

The spelling of 851418 in words is "eight hundred fifty-one thousand, four hundred eighteen".