1368181 has 2 divisors, whose sum is σ = 1368182. Its totient is φ = 1368180.

The previous prime is 1368173. The next prime is 1368187. The reversal of 1368181 is 1818631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 792100 + 576081 = 890^2 + 759^2 .

It is an emirp because it is prime and its reverse (1818631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1368181 - 2³ = 1368173 is a prime.

It is a super-2 number, since 2×1368181² = 3743838497522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1368187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684090 + 684091.

It is an arithmetic number, because the mean of its divisors is an integer number (684091).

2^1368181 is an apocalyptic number.

It is an amenable number.

1368181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368181 is an equidigital number, since it uses as much as digits as its factorization.

1368181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 28.

The square root of 1368181 is about 1169.6926946852. The cubic root of 1368181 is about 111.0148777504.

The spelling of 1368181 in words is "one million, three hundred sixty-eight thousand, one hundred eighty-one".