1285740163 has 2 divisors, whose sum is σ = 1285740164. Its totient is φ = 1285740162.

The previous prime is 1285740151. The next prime is 1285740179. The reversal of 1285740163 is 3610475821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285740163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1285740193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642870081 + 642870082.

It is an arithmetic number, because the mean of its divisors is an integer number (642870082).

Almost surely, 2^1285740163 is an apocalyptic number.

1285740163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285740163 is an equidigital number, since it uses as much as digits as its factorization.

1285740163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 1285740163 is about 35857.2191197254. The cubic root of 1285740163 is about 1087.3876681083.

The spelling of 1285740163 in words is "one billion, two hundred eighty-five million, seven hundred forty thousand, one hundred sixty-three".