1241443421 has 4 divisors (see below), whose sum is σ = 1242763644. Its totient is φ = 1240123200.

The previous prime is 1241443409. The next prime is 1241443429. The reversal of 1241443421 is 1243441421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1243441421 = 17 ⋅73143613.

It can be written as a sum of positive squares in 2 ways, for example, as 751308100 + 490135321 = 27410^2 + 22139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241443421 - 2¹⁴ = 1241427037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241443429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658700 + ... + 660581.

It is an arithmetic number, because the mean of its divisors is an integer number (310690911).

Almost surely, 2^1241443421 is an apocalyptic number.

It is an amenable number.

1241443421 is a deficient number, since it is larger than the sum of its proper divisors (1320223).

1241443421 is an equidigital number, since it uses as much as digits as its factorization.

1241443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320222.

The product of its digits is 3072, while the sum is 26.

The square root of 1241443421 is about 35234.1229634001. The cubic root of 1241443421 is about 1074.7537697452.

Adding to 1241443421 its reverse (1243441421), we get a palindrome (2484884842).

The spelling of 1241443421 in words is "one billion, two hundred forty-one million, four hundred forty-three thousand, four hundred twenty-one".