1284140343 has 4 divisors (see below), whose sum is σ = 1712187128. Its totient is φ = 856093560.

The previous prime is 1284140323. The next prime is 1284140353. The reversal of 1284140343 is 3430414821.

1284140343 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1284140343 - 2⁶ = 1284140279 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 1284140343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284140323) 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, 214023388 + ... + 214023393.

It is an arithmetic number, because the mean of its divisors is an integer number (428046782).

Almost surely, 2^1284140343 is an apocalyptic number.

1284140343 is a deficient number, since it is larger than the sum of its proper divisors (428046785).

1284140343 is an equidigital number, since it uses as much as digits as its factorization.

1284140343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428046784.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1284140343 is about 35834.9039764306. The cubic root of 1284140343 is about 1086.9364762281.

The spelling of 1284140343 in words is "one billion, two hundred eighty-four million, one hundred forty thousand, three hundred forty-three".