142945 has 16 divisors (see below), whose sum is σ = 196992. Its totient is φ = 98560.

The previous prime is 142939. The next prime is 142949. The reversal of 142945 is 549241.

142945 = T₃₀ + T₃₁ + ... + T₉₅.

It is not a de Polignac number, because 142945 - 2⁹ = 142433 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (142949) 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, 1209 + ... + 1321.

It is an arithmetic number, because the mean of its divisors is an integer number (12312).

2¹⁴²⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

142945 is a deficient number, since it is larger than the sum of its proper divisors (54047).

142945 is a wasteful number, since it uses less digits than its factorization.

142945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152.

The product of its digits is 1440, while the sum is 25.

The square root of 142945 is about 378.0806792207. The cubic root of 142945 is about 52.2865101995.

The spelling of 142945 in words is "one hundred forty-two thousand, nine hundred forty-five".