1285943 has 2 divisors, whose sum is σ = 1285944. Its totient is φ = 1285942.

The previous prime is 1285937. The next prime is 1285969. The reversal of 1285943 is 3495821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1285943 - 2¹⁴ = 1269559 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642971 + 642972.

It is an arithmetic number, because the mean of its divisors is an integer number (642972).

2^1285943 is an apocalyptic number.

1285943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285943 is an equidigital number, since it uses as much as digits as its factorization.

1285943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 1285943 is about 1133.9942680631. The cubic root of 1285943 is about 108.7444846809.

The spelling of 1285943 in words is "one million, two hundred eighty-five thousand, nine hundred forty-three".