1139849 has 2 divisors, whose sum is σ = 1139850. Its totient is φ = 1139848.

The previous prime is 1139843. The next prime is 1139851. The reversal of 1139849 is 9489311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640000 + 499849 = 800^2 + 707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139849 is a prime.

Together with 1139851, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1139843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569924 + 569925.

It is an arithmetic number, because the mean of its divisors is an integer number (569925).

2^1139849 is an apocalyptic number.

It is an amenable number.

1139849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139849 is an equidigital number, since it uses as much as digits as its factorization.

1139849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 1139849 is about 1067.6371106326. The cubic root of 1139849 is about 104.4597801618.

The spelling of 1139849 in words is "one million, one hundred thirty-nine thousand, eight hundred forty-nine".