1356181 has 2 divisors, whose sum is σ = 1356182. Its totient is φ = 1356180.

The previous prime is 1356169. The next prime is 1356197. The reversal of 1356181 is 1816531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1285956 + 70225 = 1134^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356181 - 2⁷ = 1356053 is a prime.

It is a super-2 number, since 2×1356181² = 3678453809522, which contains 22 as substring.

1356181 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678090 + 678091.

It is an arithmetic number, because the mean of its divisors is an integer number (678091).

2^1356181 is an apocalyptic number.

It is an amenable number.

1356181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356181 is an equidigital number, since it uses as much as digits as its factorization.

1356181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 1356181 is about 1164.5518451319. The cubic root of 1356181 is about 110.6893622506.

The spelling of 1356181 in words is "one million, three hundred fifty-six thousand, one hundred eighty-one".