142170945 has 16 divisors (see below), whose sum is σ = 259969920. Its totient is φ = 64992384.

The previous prime is 142170893. The next prime is 142170967. The reversal of 142170945 is 549071241.

It is a happy number.

It is not a de Polignac number, because 142170945 - 2⁸ = 142170689 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676900 + ... + 677109.

It is an arithmetic number, because the mean of its divisors is an integer number (16248120).

Almost surely, 2^142170945 is an apocalyptic number.

142170945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142170945 is a deficient number, since it is larger than the sum of its proper divisors (117798975).

142170945 is a wasteful number, since it uses less digits than its factorization.

142170945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354024.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 142170945 is about 11923.5458232860. The cubic root of 142170945 is about 521.9196122595.

The spelling of 142170945 in words is "one hundred forty-two million, one hundred seventy thousand, nine hundred forty-five".