1421043401 has 4 divisors (see below), whose sum is σ = 1442253072. Its totient is φ = 1399833732.

The previous prime is 1421043391. The next prime is 1421043443. The reversal of 1421043401 is 1043401241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1043401241 = 197 ⋅5296453.

It is a cyclic number.

It is not a de Polignac number, because 1421043401 - 2¹⁰ = 1421042377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421043301) 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, 10604735 + ... + 10604868.

It is an arithmetic number, because the mean of its divisors is an integer number (360563268).

Almost surely, 2^1421043401 is an apocalyptic number.

It is an amenable number.

1421043401 is a deficient number, since it is larger than the sum of its proper divisors (21209671).

1421043401 is an equidigital number, since it uses as much as digits as its factorization.

1421043401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21209670.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1421043401 is about 37696.7293143583. The cubic root of 1421043401 is about 1124.2660960842.

Adding to 1421043401 its reverse (1043401241), we get a palindrome (2464444642).

The spelling of 1421043401 in words is "one billion, four hundred twenty-one million, forty-three thousand, four hundred one".