2143739 has 8 divisors (see below), whose sum is σ = 2332512. Its totient is φ = 1958400.

The previous prime is 2143733. The next prime is 2143741. The reversal of 2143739 is 9373412.

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 2143739 - 2⁸ = 2143483 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2143733) 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 7 ways as a sum of consecutive naturals, for example, 539 + ... + 2139.

It is an arithmetic number, because the mean of its divisors is an integer number (291564).

2^2143739 is an apocalyptic number.

2143739 is a deficient number, since it is larger than the sum of its proper divisors (188773).

2143739 is a wasteful number, since it uses less digits than its factorization.

2143739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717.

The product of its digits is 4536, while the sum is 29.

The square root of 2143739 is about 1464.1512899970. The cubic root of 2143739 is about 128.9408819114.

It can be divided in two parts, 2143 and 739, that added together give a palindrome (2882).

The spelling of 2143739 in words is "two million, one hundred forty-three thousand, seven hundred thirty-nine".