4431139 has 4 divisors (see below), whose sum is σ = 4436224. Its totient is φ = 4426056.

The previous prime is 4431131. The next prime is 4431143. The reversal of 4431139 is 9311344.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4431139 - 2³ = 4431131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4431131) 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 3 ways as a sum of consecutive naturals, for example, 867 + ... + 3100.

It is an arithmetic number, because the mean of its divisors is an integer number (1109056).

Almost surely, 2^4431139 is an apocalyptic number.

4431139 is a deficient number, since it is larger than the sum of its proper divisors (5085).

4431139 is a wasteful number, since it uses less digits than its factorization.

4431139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084.

The product of its digits is 1296, while the sum is 25.

The square root of 4431139 is about 2105.0270782106. The cubic root of 4431139 is about 164.2499040501.

The spelling of 4431139 in words is "four million, four hundred thirty-one thousand, one hundred thirty-nine".