1216423 has 8 divisors (see below), whose sum is σ = 1321488. Its totient is φ = 1113024.

The previous prime is 1216421. The next prime is 1216433. The reversal of 1216423 is 3246121.

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

It is a cyclic number.

It is not a de Polignac number, because 1216423 - 2¹ = 1216421 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 1216423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216421) 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, 1440 + ... + 2122.

It is an arithmetic number, because the mean of its divisors is an integer number (165186).

2^1216423 is an apocalyptic number.

1216423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1216423 is a deficient number, since it is larger than the sum of its proper divisors (105065).

1216423 is a wasteful number, since it uses less digits than its factorization.

1216423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833.

The product of its digits is 288, while the sum is 19.

The square root of 1216423 is about 1102.9156812740. The cubic root of 1216423 is about 106.7484409822.

The spelling of 1216423 in words is "one million, two hundred sixteen thousand, four hundred twenty-three".