142323881 has 12 divisors (see below), whose sum is σ = 175300308. Its totient is φ = 114815232.

The previous prime is 142323877. The next prime is 142323887. The reversal of 142323881 is 188323241.

142323881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 125440000 + 16883881 = 11200^2 + 4109^2 .

It is not a de Polignac number, because 142323881 - 2² = 142323877 is a prime.

It is a super-2 number, since 2×142323881² = 40512174205804322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142323887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84596 + ... + 86261.

It is an arithmetic number, because the mean of its divisors is an integer number (14608359).

Almost surely, 2^142323881 is an apocalyptic number.

It is an amenable number.

142323881 is a deficient number, since it is larger than the sum of its proper divisors (32976427).

142323881 is a wasteful number, since it uses less digits than its factorization.

142323881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170888 (or 170881 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 142323881 is about 11929.9572924634. The cubic root of 142323881 is about 522.1066914912.

The spelling of 142323881 in words is "one hundred forty-two million, three hundred twenty-three thousand, eight hundred eighty-one".