51426 has 12 divisors (see below), whose sum is σ = 111462. Its totient is φ = 17136.

The previous prime is 51421. The next prime is 51427. The reversal of 51426 is 62415.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40401 + 11025 = 201^2 + 105^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2857 = 51426 / (5 + 1 + 4 + 2 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 51399 and 51408.

It is not an unprimeable number, because it can be changed into a prime (51421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1411 + ... + 1446.

2⁵¹⁴²⁶ is an apocalyptic number.

51426 is an abundant number, since it is smaller than the sum of its proper divisors (60036).

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

51426 is a wasteful number, since it uses less digits than its factorization.

51426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865 (or 2862 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 51426 is about 226.7730142676. The cubic root of 51426 is about 37.1872658460.

It can be divided in two parts, 5 and 1426, that added together give a triangular number (1431 = T₅₃).

The spelling of 51426 in words is "fifty-one thousand, four hundred twenty-six".