4239139 has 4 divisors (see below), whose sum is σ = 4256280. Its totient is φ = 4222000.

The previous prime is 4239121. The next prime is 4239149. The reversal of 4239139 is 9319324.

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 4239139 - 2²¹ = 2141987 is a prime.

It is a super-2 number, since 2×4239139² = 35940598922642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4239139.

It is not an unprimeable number, because it can be changed into a prime (4239149) 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, 8194 + ... + 8695.

It is an arithmetic number, because the mean of its divisors is an integer number (1064070).

Almost surely, 2^4239139 is an apocalyptic number.

4239139 is a deficient number, since it is larger than the sum of its proper divisors (17141).

4239139 is a wasteful number, since it uses less digits than its factorization.

4239139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17140.

The product of its digits is 5832, while the sum is 31.

The square root of 4239139 is about 2058.9169483007. The cubic root of 4239139 is about 161.8424903036.

The spelling of 4239139 in words is "four million, two hundred thirty-nine thousand, one hundred thirty-nine".