1123181 has 2 divisors, whose sum is σ = 1123182. Its totient is φ = 1123180.

The previous prime is 1123151. The next prime is 1123189. The reversal of 1123181 is 1813211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 688900 + 434281 = 830^2 + 659^2 .

It is an emirp because it is prime and its reverse (1813211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123181 - 2¹⁰ = 1122157 is a prime.

It is a super-2 number, since 2×1123181² = 2523071117522, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123189) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561590 + 561591.

It is an arithmetic number, because the mean of its divisors is an integer number (561591).

2^1123181 is an apocalyptic number.

It is an amenable number.

1123181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123181 is an equidigital number, since it uses as much as digits as its factorization.

1123181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 17.

The square root of 1123181 is about 1059.8023400616. The cubic root of 1123181 is about 103.9481065072.

Adding to 1123181 its reverse (1813211), we get a palindrome (2936392).

The spelling of 1123181 in words is "one million, one hundred twenty-three thousand, one hundred eighty-one".