1356081 has 4 divisors (see below), whose sum is σ = 1808112. Its totient is φ = 904052.

The previous prime is 1356079. The next prime is 1356083. The reversal of 1356081 is 1806531.

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 an interprime number because it is at equal distance from previous prime (1356079) and next prime (1356083).

It is a cyclic number.

It is not a de Polignac number, because 1356081 - 2¹ = 1356079 is a prime.

It is a super-2 number, since 2×1356081² = 3677911357122, which contains 22 as substring.

It is a D-number.

1356081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1356083) 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, 226011 + ... + 226016.

It is an arithmetic number, because the mean of its divisors is an integer number (452028).

2^1356081 is an apocalyptic number.

1356081 is the 737-th centered pentagonal number.

It is an amenable number.

1356081 is a deficient number, since it is larger than the sum of its proper divisors (452031).

1356081 is an equidigital number, since it uses as much as digits as its factorization.

1356081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452030.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1356081 is about 1164.5089093691. The cubic root of 1356081 is about 110.6866415695.

It can be divided in two parts, 135 and 6081, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 1356081 in words is "one million, three hundred fifty-six thousand, eighty-one".