1405442243 has 2 divisors, whose sum is σ = 1405442244. Its totient is φ = 1405442242.

The previous prime is 1405442161. The next prime is 1405442249. The reversal of 1405442243 is 3422445041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1405442243 - 2¹² = 1405438147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1405442249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702721121 + 702721122.

It is an arithmetic number, because the mean of its divisors is an integer number (702721122).

Almost surely, 2^1405442243 is an apocalyptic number.

1405442243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405442243 is an equidigital number, since it uses as much as digits as its factorization.

1405442243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 1405442243 is about 37489.2283596235. The cubic root of 1405442243 is about 1120.1366337878.

Adding to 1405442243 its reverse (3422445041), we get a palindrome (4827887284).

The spelling of 1405442243 in words is "one billion, four hundred five million, four hundred forty-two thousand, two hundred forty-three".