1139291 has 2 divisors, whose sum is σ = 1139292. Its totient is φ = 1139290.

The previous prime is 1139287. The next prime is 1139293. The reversal of 1139291 is 1929311.

It is a strong prime.

It is an emirp because it is prime and its reverse (1929311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1139291 - 2² = 1139287 is a prime.

Together with 1139293, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1139291.

It is not a weakly prime, because it can be changed into another prime (1139293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569645 + 569646.

It is an arithmetic number, because the mean of its divisors is an integer number (569646).

2^1139291 is an apocalyptic number.

1139291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139291 is an equidigital number, since it uses as much as digits as its factorization.

1139291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 26.

The square root of 1139291 is about 1067.3757538936. The cubic root of 1139291 is about 104.4427316839.

The spelling of 1139291 in words is "one million, one hundred thirty-nine thousand, two hundred ninety-one".