142812 has 18 divisors (see below), whose sum is σ = 361088. Its totient is φ = 47592.

The previous prime is 142811. The next prime is 142837. The reversal of 142812 is 218241.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 142812.

It is not an unprimeable number, because it can be changed into a prime (142811) 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, 1948 + ... + 2019.

2¹⁴²⁸¹² is an apocalyptic number.

142812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

142812 is an abundant number, since it is smaller than the sum of its proper divisors (218276).

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

142812 is a wasteful number, since it uses less digits than its factorization.

142812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977 (or 3972 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 142812 is about 377.9047499040. The cubic root of 142812 is about 52.2702888935.

The spelling of 142812 in words is "one hundred forty-two thousand, eight hundred twelve".