142644 has 12 divisors (see below), whose sum is σ = 332864. Its totient is φ = 47544.

The previous prime is 142619. The next prime is 142657. The reversal of 142644 is 446241.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 142644.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142644.

It is an unprimeable number.

142644 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 3 ways as a sum of consecutive naturals, for example, 5932 + ... + 5955.

2¹⁴²⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

142644 is an abundant number, since it is smaller than the sum of its proper divisors (190220).

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

142644 is a wasteful number, since it uses less digits than its factorization.

142644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11894 (or 11892 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 142644 is about 377.6824062622. The cubic root of 142644 is about 52.2497844210.

Adding to 142644 its reverse (446241), we get a palindrome (588885).

The spelling of 142644 in words is "one hundred forty-two thousand, six hundred forty-four".