142402331 has 2 divisors, whose sum is σ = 142402332. Its totient is φ = 142402330.

The previous prime is 142402327. The next prime is 142402333. The reversal of 142402331 is 133204241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142402331 - 2² = 142402327 is a prime.

It is a super-2 number, since 2×142402331² = 40556847748467122, which contains 22 as substring.

Together with 142402333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142402333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71201165 + 71201166.

It is an arithmetic number, because the mean of its divisors is an integer number (71201166).

Almost surely, 2^142402331 is an apocalyptic number.

142402331 is a deficient number, since it is larger than the sum of its proper divisors (1).

142402331 is an equidigital number, since it uses as much as digits as its factorization.

142402331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 142402331 is about 11933.2447808633. The cubic root of 142402331 is about 522.2026035904.

Adding to 142402331 its reverse (133204241), we get a palindrome (275606572).

The spelling of 142402331 in words is "one hundred forty-two million, four hundred two thousand, three hundred thirty-one".