1223044261 has 8 divisors (see below), whose sum is σ = 1230128640. Its totient is φ = 1215976032.

The previous prime is 1223044237. The next prime is 1223044279. The reversal of 1223044261 is 1624403221.

It is a happy number.

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 1223044261 - 2⁹ = 1223043749 is a prime.

It is a super-2 number, since 2×1223044261² = 2991674528730072242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223044061) 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, 168636 + ... + 175738.

It is an arithmetic number, because the mean of its divisors is an integer number (153766080).

Almost surely, 2^1223044261 is an apocalyptic number.

It is an amenable number.

1223044261 is a deficient number, since it is larger than the sum of its proper divisors (7084379).

1223044261 is an equidigital number, since it uses as much as digits as its factorization.

1223044261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8075.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1223044261 is about 34972.0497111622. The cubic root of 1223044261 is about 1069.4177578794.

Adding to 1223044261 its reverse (1624403221), we get a palindrome (2847447482).

The spelling of 1223044261 in words is "one billion, two hundred twenty-three million, forty-four thousand, two hundred sixty-one".