142009997 has 2 divisors, whose sum is σ = 142009998. Its totient is φ = 142009996.

The previous prime is 142009961. The next prime is 142010017. The reversal of 142009997 is 799900241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95374756 + 46635241 = 9766^2 + 6829^2 .

It is a cyclic number.

It is not a de Polignac number, because 142009997 - 2⁸ = 142009741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142009927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71004998 + 71004999.

It is an arithmetic number, because the mean of its divisors is an integer number (71004999).

Almost surely, 2^142009997 is an apocalyptic number.

It is an amenable number.

142009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

142009997 is an equidigital number, since it uses as much as digits as its factorization.

142009997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 142009997 is about 11916.7947452325. The cubic root of 142009997 is about 521.7225873880.

The spelling of 142009997 in words is "one hundred forty-two million, nine thousand, nine hundred ninety-seven".