1421823 has 8 divisors (see below), whose sum is σ = 2041648. Its totient is φ = 874944.

The previous prime is 1421813. The next prime is 1421857. The reversal of 1421823 is 3281241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1421823 - 2⁶ = 1421759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18190 + ... + 18267.

It is an arithmetic number, because the mean of its divisors is an integer number (255206).

2^1421823 is an apocalyptic number.

1421823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1421823 is a deficient number, since it is larger than the sum of its proper divisors (619825).

1421823 is a wasteful number, since it uses less digits than its factorization.

1421823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36473.

The product of its digits is 384, while the sum is 21.

The square root of 1421823 is about 1192.4021972472. The cubic root of 1421823 is about 112.4471653140.

It can be divided in two parts, 14218 and 23, that added together give a palindrome (14241).

The spelling of 1421823 in words is "one million, four hundred twenty-one thousand, eight hundred twenty-three".