1366181 has 8 divisors (see below), whose sum is σ = 1409400. Its totient is φ = 1323712.

The previous prime is 1366163. The next prime is 1366187. The reversal of 1366181 is 1816631.

It can be written as a sum of positive squares in 4 ways, for example, as 348100 + 1018081 = 590^2 + 1009^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1366181 - 2⁶ = 1366117 is a prime.

It is a super-2 number, since 2×1366181² = 3732901049522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1366181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7811 + ... + 7983.

It is an arithmetic number, because the mean of its divisors is an integer number (176175).

2^1366181 is an apocalyptic number.

It is an amenable number.

1366181 is a deficient number, since it is larger than the sum of its proper divisors (43219).

1366181 is a wasteful number, since it uses less digits than its factorization.

1366181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375.

The product of its digits is 864, while the sum is 26.

The square root of 1366181 is about 1168.8374566209. The cubic root of 1366181 is about 110.9607577105.

The spelling of 1366181 in words is "one million, three hundred sixty-six thousand, one hundred eighty-one".