1139279 has 4 divisors (see below), whose sum is σ = 1145376. Its totient is φ = 1133184.

The previous prime is 1139273. The next prime is 1139287. The reversal of 1139279 is 9729311.

It is a happy number.

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 1139279 - 2⁴ = 1139263 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 (1139273) 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, 2759 + ... + 3144.

It is an arithmetic number, because the mean of its divisors is an integer number (286344).

2^1139279 is an apocalyptic number.

1139279 is a deficient number, since it is larger than the sum of its proper divisors (6097).

1139279 is an equidigital number, since it uses as much as digits as its factorization.

1139279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6096.

The product of its digits is 3402, while the sum is 32.

The square root of 1139279 is about 1067.3701326157. The cubic root of 1139279 is about 104.4423649889.

Adding to 1139279 its sum of digits (32), we get a palindrome (1139311).

The spelling of 1139279 in words is "one million, one hundred thirty-nine thousand, two hundred seventy-nine".