1421423441 has 4 divisors (see below), whose sum is σ = 1421826612. Its totient is φ = 1421020272.

The previous prime is 1421423411. The next prime is 1421423447. The reversal of 1421423441 is 1443241241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 663577600 + 757845841 = 25760^2 + 27529^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421423441 - 2²² = 1417229137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421423441.

It is not an unprimeable number, because it can be changed into a prime (1421423447) 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, 196250 + ... + 203363.

It is an arithmetic number, because the mean of its divisors is an integer number (355456653).

Almost surely, 2^1421423441 is an apocalyptic number.

It is an amenable number.

1421423441 is a deficient number, since it is larger than the sum of its proper divisors (403171).

1421423441 is an equidigital number, since it uses as much as digits as its factorization.

1421423441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403170.

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

The square root of 1421423441 is about 37701.7697329979. The cubic root of 1421423441 is about 1124.3663107114.

Adding to 1421423441 its reverse (1443241241), we get a palindrome (2864664682).

The spelling of 1421423441 in words is "one billion, four hundred twenty-one million, four hundred twenty-three thousand, four hundred forty-one".