142002439 has 4 divisors (see below), whose sum is σ = 144409320. Its totient is φ = 139595560.

The previous prime is 142002431. The next prime is 142002451. The reversal of 142002439 is 934200241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142002439 - 2³ = 142002431 is a prime.

It is a Duffinian number.

142002439 is a modest number, since divided by 2439 gives 1420 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142002431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203352 + ... + 1203469.

It is an arithmetic number, because the mean of its divisors is an integer number (36102330).

Almost surely, 2^142002439 is an apocalyptic number.

142002439 is a deficient number, since it is larger than the sum of its proper divisors (2406881).

142002439 is an equidigital number, since it uses as much as digits as its factorization.

142002439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406880.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 142002439 is about 11916.4776255402. The cubic root of 142002439 is about 521.7133315859.

The spelling of 142002439 in words is "one hundred forty-two million, two thousand, four hundred thirty-nine".