142138131 has 16 divisors (see below), whose sum is σ = 196669440. Its totient is φ = 91215360.

The previous prime is 142138121. The next prime is 142138147. The reversal of 142138131 is 131831241.

142138131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142138131 - 2⁵ = 142138099 is a prime.

It is a super-2 number, since 2×142138131² = 40406496568346322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142138111) 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, 13990 + ... + 21908.

It is an arithmetic number, because the mean of its divisors is an integer number (12291840).

Almost surely, 2^142138131 is an apocalyptic number.

142138131 is a deficient number, since it is larger than the sum of its proper divisors (54531309).

142138131 is a wasteful number, since it uses less digits than its factorization.

142138131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8146.

The product of its digits is 576, while the sum is 24.

The square root of 142138131 is about 11922.1697270254. The cubic root of 142138131 is about 521.8794549968.

Adding to 142138131 its reverse (131831241), we get a palindrome (273969372).

The spelling of 142138131 in words is "one hundred forty-two million, one hundred thirty-eight thousand, one hundred thirty-one".