142840 has 16 divisors (see below), whose sum is σ = 321480. Its totient is φ = 57120.

The previous prime is 142837. The next prime is 142841. The reversal of 142840 is 48241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1746 + ... + 1825.

2¹⁴²⁸⁴⁰ is an apocalyptic number.

142840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142840 is an abundant number, since it is smaller than the sum of its proper divisors (178640).

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

142840 is a wasteful number, since it uses less digits than its factorization.

142840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3582 (or 3578 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 142840 is about 377.9417944605. The cubic root of 142840 is about 52.2737047420.

The spelling of 142840 in words is "one hundred forty-two thousand, eight hundred forty".