142845 has 16 divisors (see below), whose sum is σ = 233280. Its totient is φ = 74624.

The previous prime is 142841. The next prime is 142867. The reversal of 142845 is 548241.

142845 = T₆ + T₇ + ... + T₉₄.

142845 is a nontrivial binomial coefficient, being equal to C(535, 2).

It is a cyclic number.

It is not a de Polignac number, because 142845 - 2² = 142841 is a prime.

142845 is a lucky number.

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 15 ways as a sum of consecutive naturals, for example, 1282 + ... + 1388.

It is an arithmetic number, because the mean of its divisors is an integer number (14580).

2¹⁴²⁸⁴⁵ is an apocalyptic number.

142845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

142845 is the 534-th triangular number.

It is an amenable number.

142845 is a deficient number, since it is larger than the sum of its proper divisors (90435).

142845 is a wasteful number, since it uses less digits than its factorization.

142845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204.

The product of its digits is 1280, while the sum is 24.

The square root of 142845 is about 377.9484091778. The cubic root of 142845 is about 52.2743146680.

The spelling of 142845 in words is "one hundred forty-two thousand, eight hundred forty-five".