2142839 has 8 divisors (see below), whose sum is σ = 2334000. Its totient is φ = 1959552.

The previous prime is 2142823. The next prime is 2142857. The reversal of 2142839 is 9382412.

2142839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2142839 - 2⁴ = 2142823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1394 + ... + 2495.

It is an arithmetic number, because the mean of its divisors is an integer number (291750).

2^2142839 is an apocalyptic number.

2142839 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2142839 is a deficient number, since it is larger than the sum of its proper divisors (191161).

2142839 is a wasteful number, since it uses less digits than its factorization.

2142839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937.

The product of its digits is 3456, while the sum is 29.

The square root of 2142839 is about 1463.8439124442. The cubic root of 2142839 is about 128.9228350880.

The spelling of 2142839 in words is "two million, one hundred forty-two thousand, eight hundred thirty-nine".