1421266443 has 8 divisors (see below), whose sum is σ = 1994760000. Its totient is φ = 897641928.

The previous prime is 1421266433. The next prime is 1421266447. The reversal of 1421266443 is 3446621241.

It is a happy number.

1421266443 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1421266443 - 2²⁰ = 1420217867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421266447) 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, 12467193 + ... + 12467306.

It is an arithmetic number, because the mean of its divisors is an integer number (249345000).

Almost surely, 2^1421266443 is an apocalyptic number.

1421266443 is a deficient number, since it is larger than the sum of its proper divisors (573493557).

1421266443 is a wasteful number, since it uses less digits than its factorization.

1421266443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24934521.

The product of its digits is 27648, while the sum is 33.

The square root of 1421266443 is about 37699.6875716497. The cubic root of 1421266443 is about 1124.3249132980.

Adding to 1421266443 its reverse (3446621241), we get a palindrome (4867887684).

The spelling of 1421266443 in words is "one billion, four hundred twenty-one million, two hundred sixty-six thousand, four hundred forty-three".