142134321 has 16 divisors (see below), whose sum is σ = 216780800. Its totient is φ = 81146448.

The previous prime is 142134313. The next prime is 142134341. The reversal of 142134321 is 123431241.

It is not a de Polignac number, because 142134321 - 2³ = 142134313 is a prime.

It is a super-2 number, since 2×142134321² = 40404330412262082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142134301) 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, 28320 + ... + 32958.

It is an arithmetic number, because the mean of its divisors is an integer number (13548800).

Almost surely, 2^142134321 is an apocalyptic number.

It is an amenable number.

142134321 is a deficient number, since it is larger than the sum of its proper divisors (74646479).

142134321 is a wasteful number, since it uses less digits than its factorization.

142134321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6108.

The product of its digits is 576, while the sum is 21.

The square root of 142134321 is about 11922.0099396033. The cubic root of 142134321 is about 521.8747919776.

Adding to 142134321 its reverse (123431241), we get a palindrome (265565562).

The spelling of 142134321 in words is "one hundred forty-two million, one hundred thirty-four thousand, three hundred twenty-one".