1241404221 has 4 divisors (see below), whose sum is σ = 1655205632. Its totient is φ = 827602812.

The previous prime is 1241404187. The next prime is 1241404259. The reversal of 1241404221 is 1224041421.

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 not a de Polignac number, because 1241404221 - 2²² = 1237209917 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 (1241404271) 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, 206900701 + ... + 206900706.

It is an arithmetic number, because the mean of its divisors is an integer number (413801408).

Almost surely, 2^1241404221 is an apocalyptic number.

It is an amenable number.

1241404221 is a deficient number, since it is larger than the sum of its proper divisors (413801411).

1241404221 is an equidigital number, since it uses as much as digits as its factorization.

1241404221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413801410.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1241404221 is about 35233.5666800851. The cubic root of 1241404221 is about 1074.7424574318.

Adding to 1241404221 its reverse (1224041421), we get a palindrome (2465445642).

The spelling of 1241404221 in words is "one billion, two hundred forty-one million, four hundred four thousand, two hundred twenty-one".