851426 has 4 divisors (see below), whose sum is σ = 1277142. Its totient is φ = 425712.

The previous prime is 851423. The next prime is 851449. The reversal of 851426 is 624158.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 648025 + 203401 = 805^2 + 451^2 .

It is a junction number, because it is equal to n+sod(n) for n = 851395 and 851404.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 851426.

It is not an unprimeable number, because it can be changed into a prime (851423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212855 + ... + 212858.

2⁸⁵¹⁴²⁶ is an apocalyptic number.

851426 is a deficient number, since it is larger than the sum of its proper divisors (425716).

851426 is a wasteful number, since it uses less digits than its factorization.

851426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425715.

The product of its digits is 1920, while the sum is 26.

The square root of 851426 is about 922.7274787281. The cubic root of 851426 is about 94.7797668487.

It can be divided in two parts, 851 and 426, that multiplied together give a triangular number (362526 = T₈₅₁).

The spelling of 851426 in words is "eight hundred fifty-one thousand, four hundred twenty-six".