1139549 has 2 divisors, whose sum is σ = 1139550. Its totient is φ = 1139548.

The previous prime is 1139539. The next prime is 1139557. The reversal of 1139549 is 9459311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 47524 = 1045^2 + 218^2 .

It is a cyclic number.

It is not a de Polignac number, because 1139549 - 2⁸ = 1139293 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139519) 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 as a sum of consecutive naturals, namely, 569774 + 569775.

It is an arithmetic number, because the mean of its divisors is an integer number (569775).

2^1139549 is an apocalyptic number.

It is an amenable number.

1139549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139549 is an equidigital number, since it uses as much as digits as its factorization.

1139549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 32.

The square root of 1139549 is about 1067.4966042101. The cubic root of 1139549 is about 104.4506150052.

The spelling of 1139549 in words is "one million, one hundred thirty-nine thousand, five hundred forty-nine".