142402031 has 2 divisors, whose sum is σ = 142402032. Its totient is φ = 142402030.

The previous prime is 142402027. The next prime is 142402033. The reversal of 142402031 is 130204241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142402031 - 2² = 142402027 is a prime.

It is a super-2 number, since 2×142402031² = 40556676865849922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 142402033, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_8040212 and since 142402031 and 8040212 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142402033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71201015 + 71201016.

It is an arithmetic number, because the mean of its divisors is an integer number (71201016).

Almost surely, 2^142402031 is an apocalyptic number.

142402031 is a deficient number, since it is larger than the sum of its proper divisors (1).

142402031 is an equidigital number, since it uses as much as digits as its factorization.

142402031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 142402031 is about 11933.2322109310. The cubic root of 142402031 is about 522.2022368808.

Adding to 142402031 its reverse (130204241), we get a palindrome (272606272).

The spelling of 142402031 in words is "one hundred forty-two million, four hundred two thousand, thirty-one".