51746 has 4 divisors (see below), whose sum is σ = 77622. Its totient is φ = 25872.

The previous prime is 51721. The next prime is 51749. The reversal of 51746 is 64715.

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., 44521 + 7225 = 211^2 + 85^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (51749) by changing a digit.

51746 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12935 + ... + 12938.

2⁵¹⁷⁴⁶ is an apocalyptic number.

51746 is a deficient number, since it is larger than the sum of its proper divisors (25876).

51746 is a wasteful number, since it uses less digits than its factorization.

51746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25875.

The product of its digits is 840, while the sum is 23.

The square root of 51746 is about 227.4774714120. The cubic root of 51746 is about 37.2642394099.

It can be divided in two parts, 51 and 746, that added together give a palindrome (797).

The spelling of 51746 in words is "fifty-one thousand, seven hundred forty-six".