45142 has 4 divisors (see below), whose sum is σ = 67716. Its totient is φ = 22570.

The previous prime is 45139. The next prime is 45161. The reversal of 45142 is 24154.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 11284 + ... + 11287.

It is an arithmetic number, because the mean of its divisors is an integer number (16929).

2⁴⁵¹⁴² is an apocalyptic number.

45142 is a deficient number, since it is larger than the sum of its proper divisors (22574).

45142 is a wasteful number, since it uses less digits than its factorization.

45142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22573.

The product of its digits is 160, while the sum is 16.

The square root of 45142 is about 212.4664679426. The cubic root of 45142 is about 35.6063070086.

Adding to 45142 its reverse (24154), we get a palindrome (69296).

The spelling of 45142 in words is "forty-five thousand, one hundred forty-two".