142489 has 4 divisors (see below), whose sum is σ = 144180. Its totient is φ = 140800.

The previous prime is 142469. The next prime is 142501. The reversal of 142489 is 984241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 99225 + 43264 = 315^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 142489 - 2¹⁵ = 109721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142469) 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, 712 + ... + 889.

It is an arithmetic number, because the mean of its divisors is an integer number (36045).

2¹⁴²⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

142489 is a deficient number, since it is larger than the sum of its proper divisors (1691).

142489 is an equidigital number, since it uses as much as digits as its factorization.

142489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690.

The product of its digits is 2304, while the sum is 28.

The square root of 142489 is about 377.4771516264. The cubic root of 142489 is about 52.2308523202.

Subtracting from 142489 its product of digits (2304), we obtain a triangular number (140185 = T₅₂₉).

It can be divided in two parts, 1424 and 89, that multiplied together give a square (126736 = 356²).

The spelling of 142489 in words is "one hundred forty-two thousand, four hundred eighty-nine".