1223239 has 4 divisors (see below), whose sum is σ = 1287640. Its totient is φ = 1158840.

The previous prime is 1223237. The next prime is 1223263. The reversal of 1223239 is 9323221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1223239 - 2¹ = 1223237 is a prime.

It is a super-2 number, since 2×1223239² = 2992627302242, which contains 22 as substring.

It is a Duffinian number.

1223239 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32172 + ... + 32209.

It is an arithmetic number, because the mean of its divisors is an integer number (321910).

2^1223239 is an apocalyptic number.

1223239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1223239 is a deficient number, since it is larger than the sum of its proper divisors (64401).

1223239 is an equidigital number, since it uses as much as digits as its factorization.

1223239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64400.

The product of its digits is 648, while the sum is 22.

The square root of 1223239 is about 1106.0013562379. The cubic root of 1223239 is about 106.9474514150.

The spelling of 1223239 in words is "one million, two hundred twenty-three thousand, two hundred thirty-nine".