142401997 has 2 divisors, whose sum is σ = 142401998. Its totient is φ = 142401996.

The previous prime is 142401991. The next prime is 142402019. The reversal of 142401997 is 799104241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76370121 + 66031876 = 8739^2 + 8126^2 .

It is a cyclic number.

It is not a de Polignac number, because 142401997 - 2³ = 142401989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142401991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71200998 + 71200999.

It is an arithmetic number, because the mean of its divisors is an integer number (71200999).

Almost surely, 2^142401997 is an apocalyptic number.

It is an amenable number.

142401997 is a deficient number, since it is larger than the sum of its proper divisors (1).

142401997 is an equidigital number, since it uses as much as digits as its factorization.

142401997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 142401997 is about 11933.2307863378. The cubic root of 142401997 is about 522.2021953204.

The spelling of 142401997 in words is "one hundred forty-two million, four hundred one thousand, nine hundred ninety-seven".