142446431 has 2 divisors, whose sum is σ = 142446432. Its totient is φ = 142446430.

The previous prime is 142446427. The next prime is 142446449. The reversal of 142446431 is 134644241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142446431 - 2² = 142446427 is a prime.

It is a super-2 number, since 2×142446431² = 40581971409275522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142446394 and 142446403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142446481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71223215 + 71223216.

It is an arithmetic number, because the mean of its divisors is an integer number (71223216).

Almost surely, 2^142446431 is an apocalyptic number.

142446431 is a deficient number, since it is larger than the sum of its proper divisors (1).

142446431 is an equidigital number, since it uses as much as digits as its factorization.

142446431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 29.

The square root of 142446431 is about 11935.0924169024. The cubic root of 142446431 is about 522.2565042951.

The spelling of 142446431 in words is "one hundred forty-two million, four hundred forty-six thousand, four hundred thirty-one".