142342431 has 32 divisors (see below), whose sum is σ = 239003136. Its totient is φ = 73200000.

The previous prime is 142342391. The next prime is 142342457. The reversal of 142342431 is 134243241.

It is not a de Polignac number, because 142342431 - 2⁷ = 142342303 is a prime.

It is a super-2 number, since 2×142342431² = 40522735325979522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142342631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20281 + ... + 26381.

It is an arithmetic number, because the mean of its divisors is an integer number (7468848).

Almost surely, 2^142342431 is an apocalyptic number.

142342431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142342431 is a deficient number, since it is larger than the sum of its proper divisors (96660705).

142342431 is a wasteful number, since it uses less digits than its factorization.

142342431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6223.

The product of its digits is 2304, while the sum is 24.

The square root of 142342431 is about 11930.7347217177. The cubic root of 142342431 is about 522.1293736963.

Adding to 142342431 its reverse (134243241), we get a palindrome (276585672).

The spelling of 142342431 in words is "one hundred forty-two million, three hundred forty-two thousand, four hundred thirty-one".