1138549 has 4 divisors (see below), whose sum is σ = 1146880. Its totient is φ = 1130220.

The previous prime is 1138547. The next prime is 1138559. The reversal of 1138549 is 9458311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1138549 - 2¹ = 1138547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1138549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3957 + ... + 4234.

It is an arithmetic number, because the mean of its divisors is an integer number (286720).

2^1138549 is an apocalyptic number.

It is an amenable number.

1138549 is a deficient number, since it is larger than the sum of its proper divisors (8331).

1138549 is an equidigital number, since it uses as much as digits as its factorization.

1138549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8330.

The product of its digits is 4320, while the sum is 31.

The square root of 1138549 is about 1067.0281158433. The cubic root of 1138549 is about 104.4200528609.

The spelling of 1138549 in words is "one million, one hundred thirty-eight thousand, five hundred forty-nine".