1138281 has 8 divisors (see below), whose sum is σ = 1546560. Its totient is φ = 744432.

The previous prime is 1138273. The next prime is 1138363. The reversal of 1138281 is 1828311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1138281 - 2³ = 1138273 is a prime.

It is a super-2 number, since 2×1138281² = 2591367269922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1138681) 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 in 7 ways as a sum of consecutive naturals, for example, 3421 + ... + 3738.

It is an arithmetic number, because the mean of its divisors is an integer number (193320).

2^1138281 is an apocalyptic number.

It is an amenable number.

1138281 is a deficient number, since it is larger than the sum of its proper divisors (408279).

1138281 is an equidigital number, since it uses as much as digits as its factorization.

1138281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7215.

The product of its digits is 384, while the sum is 24.

The square root of 1138281 is about 1066.9025260069. The cubic root of 1138281 is about 104.4118591657.

The spelling of 1138281 in words is "one million, one hundred thirty-eight thousand, two hundred eighty-one".