1423181 has 2 divisors, whose sum is σ = 1423182. Its totient is φ = 1423180.

The previous prime is 1423159. The next prime is 1423183. The reversal of 1423181 is 1813241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1069156 + 354025 = 1034^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423181 - 2¹⁸ = 1161037 is a prime.

It is a super-2 number, since 2×1423181² = 4050888317522, which contains 22 as substring.

Together with 1423183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423183) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711590 + 711591.

It is an arithmetic number, because the mean of its divisors is an integer number (711591).

2^1423181 is an apocalyptic number.

It is an amenable number.

1423181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423181 is an equidigital number, since it uses as much as digits as its factorization.

1423181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 20.

The square root of 1423181 is about 1192.9715000787. The cubic root of 1423181 is about 112.4829537959.

The spelling of 1423181 in words is "one million, four hundred twenty-three thousand, one hundred eighty-one".