142402431 has 4 divisors (see below), whose sum is σ = 189869912. Its totient is φ = 94934952.

The previous prime is 142402411. The next prime is 142402483. The reversal of 142402431 is 134204241.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 142402431 - 2⁵ = 142402399 is a prime.

It is a super-2 number, since 2×142402431² = 40556904709419522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142402398 and 142402407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142402411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23733736 + ... + 23733741.

It is an arithmetic number, because the mean of its divisors is an integer number (47467478).

Almost surely, 2^142402431 is an apocalyptic number.

142402431 is a deficient number, since it is larger than the sum of its proper divisors (47467481).

142402431 is an equidigital number, since it uses as much as digits as its factorization.

142402431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47467480.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 142402431 is about 11933.2489708377. The cubic root of 142402431 is about 522.2027258268.

Adding to 142402431 its reverse (134204241), we get a palindrome (276606672).

The spelling of 142402431 in words is "one hundred forty-two million, four hundred two thousand, four hundred thirty-one".