1263423 has 16 divisors (see below), whose sum is σ = 2039040. Its totient is φ = 679296.

The previous prime is 1263403. The next prime is 1263461. The reversal of 1263423 is 3243621.

It is a happy number.

It is not a de Polignac number, because 1263423 - 2⁵ = 1263391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a d-powerful number, because it can be written as 1 + 2¹¹ + 6⁵ + 3⁹ + 4¹⁰ + 2¹³ + 3¹¹ .

It is a self number, because there is not a number n which added to its sum of digits gives 1263423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263403) 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 in 15 ways as a sum of consecutive naturals, for example, 1413 + ... + 2126.

It is an arithmetic number, because the mean of its divisors is an integer number (127440).

2^1263423 is an apocalyptic number.

1263423 is a deficient number, since it is larger than the sum of its proper divisors (775617).

1263423 is a wasteful number, since it uses less digits than its factorization.

1263423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3566.

The product of its digits is 864, while the sum is 21.

The square root of 1263423 is about 1124.0209072789. The cubic root of 1263423 is about 108.1059488414.

The spelling of 1263423 in words is "one million, two hundred sixty-three thousand, four hundred twenty-three".