2142239 has 4 divisors (see below), whose sum is σ = 2337000. Its totient is φ = 1947480.

The previous prime is 2142229. The next prime is 2142241. The reversal of 2142239 is 9322412.

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 2142239 - 2²⁰ = 1093663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97364 + ... + 97385.

It is an arithmetic number, because the mean of its divisors is an integer number (584250).

2^2142239 is an apocalyptic number.

2142239 is a deficient number, since it is larger than the sum of its proper divisors (194761).

2142239 is a wasteful number, since it uses less digits than its factorization.

2142239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194760.

The product of its digits is 864, while the sum is 23.

The square root of 2142239 is about 1463.6389582134. The cubic root of 2142239 is about 128.9108010649.

It can be divided in two parts, 2 and 142239, that added together give a palindrome (142241).

The spelling of 2142239 in words is "two million, one hundred forty-two thousand, two hundred thirty-nine".