142890 has 32 divisors (see below), whose sum is σ = 374976. Its totient is φ = 34560.

The previous prime is 142873. The next prime is 142897. The reversal of 142890 is 98241.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 142890.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114 + ... + 546.

It is an arithmetic number, because the mean of its divisors is an integer number (11718).

2¹⁴²⁸⁹⁰ is an apocalyptic number.

142890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 142890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187488).

142890 is an abundant number, since it is smaller than the sum of its proper divisors (232086).

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

142890 is a wasteful number, since it uses less digits than its factorization.

142890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 142890 is about 378.0079364246. The cubic root of 142890 is about 52.2798033613.

The spelling of 142890 in words is "one hundred forty-two thousand, eight hundred ninety".