1229823 has 28 divisors (see below), whose sum is σ = 2116048. Its totient is φ = 699840.

The previous prime is 1229807. The next prime is 1229827. The reversal of 1229823 is 3289221.

It is a happy number.

It is not a de Polignac number, because 1229823 - 2⁴ = 1229807 is a prime.

It is a super-2 number, since 2×1229823² = 3024929222658, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229827) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4983 + ... + 5223.

2^1229823 is an apocalyptic number.

1229823 is a deficient number, since it is larger than the sum of its proper divisors (886225).

1229823 is an frugal number, since it uses more digits than its factorization.

1229823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 251 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1229823 is about 1108.9738500073. The cubic root of 1229823 is about 107.1389872888.

It can be divided in two parts, 12298 and 23, that added together give a palindrome (12321).

The spelling of 1229823 in words is "one million, two hundred twenty-nine thousand, eight hundred twenty-three".