1138539 has 4 divisors (see below), whose sum is σ = 1518056. Its totient is φ = 759024.

The previous prime is 1138519. The next prime is 1138547. The reversal of 1138539 is 9358311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1138539 - 2⁷ = 1138411 is a prime.

It is a D-number.

It is a Duffinian number.

1138539 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1138519) 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, 189754 + ... + 189759.

It is an arithmetic number, because the mean of its divisors is an integer number (379514).

2^1138539 is an apocalyptic number.

1138539 is a deficient number, since it is larger than the sum of its proper divisors (379517).

1138539 is an equidigital number, since it uses as much as digits as its factorization.

1138539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379516.

The product of its digits is 3240, while the sum is 30.

The square root of 1138539 is about 1067.0234299208. The cubic root of 1138539 is about 104.4197471491.

The spelling of 1138539 in words is "one million, one hundred thirty-eight thousand, five hundred thirty-nine".