1420421243 has 8 divisors (see below), whose sum is σ = 1441398240. Its totient is φ = 1399471360.

The previous prime is 1420421203. The next prime is 1420421257. The reversal of 1420421243 is 3421240241.

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

It is a cyclic number.

It is not a de Polignac number, because 1420421243 - 2⁸ = 1420420987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420421203) 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 7 ways as a sum of consecutive naturals, for example, 114593 + ... + 126381.

It is an arithmetic number, because the mean of its divisors is an integer number (180174780).

Almost surely, 2^1420421243 is an apocalyptic number.

1420421243 is a deficient number, since it is larger than the sum of its proper divisors (20976997).

1420421243 is a wasteful number, since it uses less digits than its factorization.

1420421243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13557.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1420421243 is about 37688.4762626456. The cubic root of 1420421243 is about 1124.1019975891.

Adding to 1420421243 its reverse (3421240241), we get a palindrome (4841661484).

The spelling of 1420421243 in words is "one billion, four hundred twenty million, four hundred twenty-one thousand, two hundred forty-three".