1420043243 has 4 divisors (see below), whose sum is σ = 1420296000. Its totient is φ = 1419790488.

The previous prime is 1420043213. The next prime is 1420043267. The reversal of 1420043243 is 3423400241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3423400241 = 47 ⋅72838303.

It is a cyclic number.

It is not a de Polignac number, because 1420043243 - 2¹⁰ = 1420042219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420043213) 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, 117755 + ... + 129252.

It is an arithmetic number, because the mean of its divisors is an integer number (355074000).

Almost surely, 2^1420043243 is an apocalyptic number.

1420043243 is a deficient number, since it is larger than the sum of its proper divisors (252757).

1420043243 is an equidigital number, since it uses as much as digits as its factorization.

1420043243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252756.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1420043243 is about 37683.4611334999. The cubic root of 1420043243 is about 1124.0022740611.

Adding to 1420043243 its reverse (3423400241), we get a palindrome (4843443484).

The spelling of 1420043243 in words is "one billion, four hundred twenty million, forty-three thousand, two hundred forty-three".