1421243453 has 32 divisors (see below), whose sum is σ = 1794170880. Its totient is φ = 1098360000.

The previous prime is 1421243449. The next prime is 1421243459. The reversal of 1421243453 is 3543421241.

It is a cyclic number.

It is not a de Polignac number, because 1421243453 - 2² = 1421243449 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421243459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248678 + ... + 254328.

It is an arithmetic number, because the mean of its divisors is an integer number (56067840).

Almost surely, 2^1421243453 is an apocalyptic number.

It is an amenable number.

1421243453 is a deficient number, since it is larger than the sum of its proper divisors (372927427).

1421243453 is a wasteful number, since it uses less digits than its factorization.

1421243453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5769.

The product of its digits is 11520, while the sum is 29.

The square root of 1421243453 is about 37699.3826607280. The cubic root of 1421243453 is about 1124.3188510124.

Adding to 1421243453 its reverse (3543421241), we get a palindrome (4964664694).

The spelling of 1421243453 in words is "one billion, four hundred twenty-one million, two hundred forty-three thousand, four hundred fifty-three".