1241223421 has 4 divisors (see below), whose sum is σ = 1241788032. Its totient is φ = 1240658812.

The previous prime is 1241223419. The next prime is 1241223443. The reversal of 1241223421 is 1243221421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1241223421 - 2¹ = 1241223419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1241223392 and 1241223401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241223481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278995 + ... + 283408.

It is an arithmetic number, because the mean of its divisors is an integer number (310447008).

Almost surely, 2^1241223421 is an apocalyptic number.

It is an amenable number.

1241223421 is a deficient number, since it is larger than the sum of its proper divisors (564611).

1241223421 is an equidigital number, since it uses as much as digits as its factorization.

1241223421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564610.

The product of its digits is 768, while the sum is 22.

The square root of 1241223421 is about 35231.0008515228. Note that the first 3 decimals coincide. The cubic root of 1241223421 is about 1074.6902791895.

Adding to 1241223421 its reverse (1243221421), we get a palindrome (2484444842).

The spelling of 1241223421 in words is "one billion, two hundred forty-one million, two hundred twenty-three thousand, four hundred twenty-one".