1814381 has 2 divisors, whose sum is σ = 1814382. Its totient is φ = 1814380.

The previous prime is 1814377. The next prime is 1814383. The reversal of 1814381 is 1834181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1190281 + 624100 = 1091^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1814381 - 2² = 1814377 is a prime.

It is a super-2 number, since 2×1814381² = 6583956826322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1814383, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1814381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1814383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 907190 + 907191.

It is an arithmetic number, because the mean of its divisors is an integer number (907191).

2^1814381 is an apocalyptic number.

It is an amenable number.

1814381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1814381 is an equidigital number, since it uses as much as digits as its factorization.

1814381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 26.

The square root of 1814381 is about 1346.9896064929. The cubic root of 1814381 is about 121.9671370771.

The spelling of 1814381 in words is "one million, eight hundred fourteen thousand, three hundred eighty-one".