142642431 has 16 divisors (see below), whose sum is σ = 211855200. Its totient is φ = 94855104.

The previous prime is 142642421. The next prime is 142642433. The reversal of 142642431 is 134246241.

It is a happy number.

142642431 is a `hidden beast` number, since 14 + 2 + 642 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 142642431 - 2⁵ = 142642399 is a prime.

It is a super-2 number, since 2×142642431² = 40693726243179522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 142642395 and 142642404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142642433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4585 + ... + 17501.

It is an arithmetic number, because the mean of its divisors is an integer number (13240950).

Almost surely, 2^142642431 is an apocalyptic number.

142642431 is a deficient number, since it is larger than the sum of its proper divisors (69212769).

142642431 is a wasteful number, since it uses less digits than its factorization.

142642431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13335 (or 13329 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 142642431 is about 11943.3006744367. The cubic root of 142642431 is about 522.4959284803.

Adding to 142642431 its reverse (134246241), we get a palindrome (276888672).

The spelling of 142642431 in words is "one hundred forty-two million, six hundred forty-two thousand, four hundred thirty-one".