51142 has 16 divisors (see below), whose sum is σ = 94752. Its totient is φ = 20160.

The previous prime is 51137. The next prime is 51151. The reversal of 51142 is 24115.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

51142 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 in 7 ways as a sum of consecutive naturals, for example, 42 + ... + 322.

It is an arithmetic number, because the mean of its divisors is an integer number (5922).

2⁵¹¹⁴² is an apocalyptic number.

51142 is a deficient number, since it is larger than the sum of its proper divisors (43610).

51142 is a wasteful number, since it uses less digits than its factorization.

51142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303.

The product of its digits is 40, while the sum is 13.

The square root of 51142 is about 226.1459705588. The cubic root of 51142 is about 37.1186839047.

Adding to 51142 its reverse (24115), we get a palindrome (75257).

The spelling of 51142 in words is "fifty-one thousand, one hundred forty-two".