1138181 has 4 divisors (see below), whose sum is σ = 1241664. Its totient is φ = 1034700.

The previous prime is 1138171. The next prime is 1138183. The reversal of 1138181 is 1818311.

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 1138181 - 2⁶ = 1138117 is a prime.

It is a super-2 number, since 2×1138181² = 2590911977522, 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 (1138183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51725 + ... + 51746.

It is an arithmetic number, because the mean of its divisors is an integer number (310416).

2^1138181 is an apocalyptic number.

1138181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1138181 is a deficient number, since it is larger than the sum of its proper divisors (103483).

1138181 is a wasteful number, since it uses less digits than its factorization.

1138181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103482.

The product of its digits is 192, while the sum is 23.

The square root of 1138181 is about 1066.8556603402. The cubic root of 1138181 is about 104.4088014873.

The spelling of 1138181 in words is "one million, one hundred thirty-eight thousand, one hundred eighty-one".