1231423 has 2 divisors, whose sum is σ = 1231424. Its totient is φ = 1231422.

The previous prime is 1231421. The next prime is 1231453. The reversal of 1231423 is 3241321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231423 - 2¹ = 1231421 is a prime.

Together with 1231421, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1231397 and 1231406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615711 + 615712.

It is an arithmetic number, because the mean of its divisors is an integer number (615712).

2^1231423 is an apocalyptic number.

1231423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231423 is an equidigital number, since it uses as much as digits as its factorization.

1231423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 16.

The square root of 1231423 is about 1109.6950031428. The cubic root of 1231423 is about 107.1854297696.

Adding to 1231423 its reverse (3241321), we get a palindrome (4472744).

The spelling of 1231423 in words is "one million, two hundred thirty-one thousand, four hundred twenty-three".