1139439 has 16 divisors (see below), whose sum is σ = 1797120. Its totient is φ = 628320.

The previous prime is 1139423. The next prime is 1139461. The reversal of 1139439 is 9349311.

It is not a de Polignac number, because 1139439 - 2⁴ = 1139423 is a prime.

1139439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327 + ... + 1544.

It is an arithmetic number, because the mean of its divisors is an integer number (112320).

2^1139439 is an apocalyptic number.

1139439 is a deficient number, since it is larger than the sum of its proper divisors (657681).

1139439 is a wasteful number, since it uses less digits than its factorization.

1139439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910.

The product of its digits is 2916, while the sum is 30.

The square root of 1139439 is about 1067.4450805545. The cubic root of 1139439 is about 104.4472540448.

The spelling of 1139439 in words is "one million, one hundred thirty-nine thousand, four hundred thirty-nine".