1223829 has 20 divisors (see below), whose sum is σ = 1894860. Its totient is φ = 786240.

The previous prime is 1223777. The next prime is 1223857. The reversal of 1223829 is 9283221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 492804 + 731025 = 702^2 + 855^2 .

It is not a de Polignac number, because 1223829 - 2¹³ = 1215637 is a prime.

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

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223879) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2089 + ... + 2609.

It is an arithmetic number, because the mean of its divisors is an integer number (94743).

2^1223829 is an apocalyptic number.

It is an amenable number.

1223829 is a deficient number, since it is larger than the sum of its proper divisors (671031).

1223829 is an equidigital number, since it uses as much as digits as its factorization.

1223829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 553 counting only the distinct ones).

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

The square root of 1223829 is about 1106.2680507002. The cubic root of 1223829 is about 106.9646431642.

The spelling of 1223829 in words is "one million, two hundred twenty-three thousand, eight hundred twenty-nine".