142003989 has 8 divisors (see below), whose sum is σ = 210376320. Its totient is φ = 94669308.

The previous prime is 142003987. The next prime is 142003991. The reversal of 142003989 is 989300241.

It is an interprime number because it is at equal distance from previous prime (142003987) and next prime (142003991).

It is not a de Polignac number, because 142003989 - 2¹ = 142003987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142003987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2629677 + ... + 2629730.

It is an arithmetic number, because the mean of its divisors is an integer number (26297040).

Almost surely, 2^142003989 is an apocalyptic number.

It is an amenable number.

142003989 is a deficient number, since it is larger than the sum of its proper divisors (68372331).

142003989 is an equidigital number, since it uses as much as digits as its factorization.

142003989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5259416 (or 5259410 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 142003989 is about 11916.5426613595. The cubic root of 142003989 is about 521.7152297992.

The spelling of 142003989 in words is "one hundred forty-two million, three thousand, nine hundred eighty-nine".