142561939 has 8 divisors (see below), whose sum is σ = 154258832. Its totient is φ = 130969440.

The previous prime is 142561933. The next prime is 142561943. The reversal of 142561939 is 939165241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142561939 - 2³ = 142561931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142561931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23244 + ... + 28729.

It is an arithmetic number, because the mean of its divisors is an integer number (19282354).

Almost surely, 2^142561939 is an apocalyptic number.

142561939 is a deficient number, since it is larger than the sum of its proper divisors (11696893).

142561939 is a wasteful number, since it uses less digits than its factorization.

142561939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52197.

The product of its digits is 58320, while the sum is 40.

The square root of 142561939 is about 11939.9304436835. The cubic root of 142561939 is about 522.3976298763.

The spelling of 142561939 in words is "one hundred forty-two million, five hundred sixty-one thousand, nine hundred thirty-nine".