1223261 has 8 divisors (see below), whose sum is σ = 1336440. Its totient is φ = 1112832.

The previous prime is 1223237. The next prime is 1223263. The reversal of 1223261 is 1623221.

It can be written as a sum of positive squares in 4 ways, for example, as 184900 + 1038361 = 430^2 + 1019^2 .

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 1223261 - 2⁶ = 1223197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305 + ... + 1593.

It is an arithmetic number, because the mean of its divisors is an integer number (167055).

2^1223261 is an apocalyptic number.

It is an amenable number.

1223261 is a deficient number, since it is larger than the sum of its proper divisors (113179).

1223261 is a wasteful number, since it uses less digits than its factorization.

1223261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375.

The product of its digits is 144, while the sum is 17.

The square root of 1223261 is about 1106.0113019314. The cubic root of 1223261 is about 106.9480925625.

Adding to 1223261 its reverse (1623221), we get a palindrome (2846482).

The spelling of 1223261 in words is "one million, two hundred twenty-three thousand, two hundred sixty-one".