1408181 has 2 divisors, whose sum is σ = 1408182. Its totient is φ = 1408180.

The previous prime is 1408177. The next prime is 1408201. The reversal of 1408181 is 1818041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1380625 + 27556 = 1175^2 + 166^2 .

It is a cyclic number.

It is not a de Polignac number, because 1408181 - 2² = 1408177 is a prime.

It is a super-2 number, since 2×1408181² = 3965947457522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1408111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 704090 + 704091.

It is an arithmetic number, because the mean of its divisors is an integer number (704091).

2^1408181 is an apocalyptic number.

It is an amenable number.

1408181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1408181 is an equidigital number, since it uses as much as digits as its factorization.

1408181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 1408181 is about 1186.6680243438. The cubic root of 1408181 is about 112.0863757583.

The spelling of 1408181 in words is "one million, four hundred eight thousand, one hundred eighty-one".