1224239 has 2 divisors, whose sum is σ = 1224240. Its totient is φ = 1224238.

The previous prime is 1224233. The next prime is 1224257. The reversal of 1224239 is 9324221.

It is a weak prime.

It is an emirp because it is prime and its reverse (9324221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1224239 - 2²⁰ = 175663 is a prime.

It is a super-2 number, since 2×1224239² = 2997522258242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612119 + 612120.

It is an arithmetic number, because the mean of its divisors is an integer number (612120).

2^1224239 is an apocalyptic number.

1224239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224239 is an equidigital number, since it uses as much as digits as its factorization.

1224239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 1224239 is about 1106.4533428934. The cubic root of 1224239 is about 106.9765867193.

The spelling of 1224239 in words is "one million, two hundred twenty-four thousand, two hundred thirty-nine".