1240423 has 2 divisors, whose sum is σ = 1240424. Its totient is φ = 1240422.

The previous prime is 1240399. The next prime is 1240483. The reversal of 1240423 is 3240421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240423 - 2⁵ = 1240391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240397 and 1240406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240483) 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, 620211 + 620212.

It is an arithmetic number, because the mean of its divisors is an integer number (620212).

2^1240423 is an apocalyptic number.

1240423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240423 is an equidigital number, since it uses as much as digits as its factorization.

1240423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1240423 is about 1113.7427889778. The cubic root of 1240423 is about 107.4459219622.

Adding to 1240423 its reverse (3240421), we get a palindrome (4480844).

The spelling of 1240423 in words is "one million, two hundred forty thousand, four hundred twenty-three".