1138869 has 6 divisors (see below), whose sum is σ = 1645046. Its totient is φ = 759240.

The previous prime is 1138867. The next prime is 1138883. The reversal of 1138869 is 9688311.

It can be written as a sum of positive squares in only one way, i.e., 1127844 + 11025 = 1062^2 + 105^2 .

It is not a de Polignac number, because 1138869 - 2¹ = 1138867 is a prime.

It is a super-2 number, since 2×1138869² = 2594045198322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63262 + ... + 63279.

2^1138869 is an apocalyptic number.

It is an amenable number.

1138869 is a deficient number, since it is larger than the sum of its proper divisors (506177).

1138869 is a wasteful number, since it uses less digits than its factorization.

1138869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126547 (or 126544 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1138869 is about 1067.1780544970. The cubic root of 1138869 is about 104.4298346934.

The spelling of 1138869 in words is "one million, one hundred thirty-eight thousand, eight hundred sixty-nine".