1366081 has 4 divisors (see below), whose sum is σ = 1438000. Its totient is φ = 1294164.

The previous prime is 1366031. The next prime is 1366087. The reversal of 1366081 is 1806631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1366081 - 2¹⁵ = 1333313 is a prime.

It is a super-2 number, since 2×1366081² = 3732354597122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1366087) 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, 35931 + ... + 35968.

It is an arithmetic number, because the mean of its divisors is an integer number (359500).

2^1366081 is an apocalyptic number.

It is an amenable number.

1366081 is a deficient number, since it is larger than the sum of its proper divisors (71919).

1366081 is an equidigital number, since it uses as much as digits as its factorization.

1366081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71918.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1366081 is about 1168.7946782904. The cubic root of 1366081 is about 110.9580503224.

The spelling of 1366081 in words is "one million, three hundred sixty-six thousand, eighty-one".