53442 has 12 divisors (see below), whose sum is σ = 115830. Its totient is φ = 17808.

The previous prime is 53441. The next prime is 53453. The reversal of 53442 is 24435.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 53361 + 81 = 231^2 + 9^2 .

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: 2969 = 53442 / (5 + 3 + 4 + 4 + 2).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (53441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1467 + ... + 1502.

2⁵³⁴⁴² is an apocalyptic number.

53442 is an abundant number, since it is smaller than the sum of its proper divisors (62388).

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

53442 is a wasteful number, since it uses less digits than its factorization.

53442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977 (or 2974 counting only the distinct ones).

The product of its digits is 480, while the sum is 18.

The square root of 53442 is about 231.1752581917. The cubic root of 53442 is about 37.6669886242. Note that the first 3 decimals are identical.

Adding to 53442 its reverse (24435), we get a palindrome (77877).

It can be divided in two parts, 534 and 42, that added together give a square (576 = 24²).

The spelling of 53442 in words is "fifty-three thousand, four hundred forty-two".