1117381 has 4 divisors (see below), whose sum is σ = 1119564. Its totient is φ = 1115200.

The previous prime is 1117379. The next prime is 1117433. The reversal of 1117381 is 1837111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1837111 = 227 ⋅8093.

It can be written as a sum of positive squares in 2 ways, for example, as 245025 + 872356 = 495^2 + 934^2 .

It is a cyclic number.

It is not a de Polignac number, because 1117381 - 2¹ = 1117379 is a prime.

It is a super-2 number, since 2×1117381² = 2497080598322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1117301) 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, 141 + ... + 1501.

It is an arithmetic number, because the mean of its divisors is an integer number (279891).

2^1117381 is an apocalyptic number.

It is an amenable number.

1117381 is a deficient number, since it is larger than the sum of its proper divisors (2183).

1117381 is an equidigital number, since it uses as much as digits as its factorization.

1117381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182.

The product of its digits is 168, while the sum is 22.

The square root of 1117381 is about 1057.0624390262. The cubic root of 1117381 is about 103.7688715853.

It can be divided in two parts, 11 and 17381, that multiplied together give a palindrome (191191).

The spelling of 1117381 in words is "one million, one hundred seventeen thousand, three hundred eighty-one".