1284145197 has 8 divisors (see below), whose sum is σ = 1715682720. Its totient is φ = 854352240.

The previous prime is 1284145189. The next prime is 1284145217. The reversal of 1284145197 is 7915414821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1284145197 - 2³ = 1284145189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284145097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434422 + ... + 437367.

It is an arithmetic number, because the mean of its divisors is an integer number (214460340).

Almost surely, 2^1284145197 is an apocalyptic number.

It is an amenable number.

1284145197 is a deficient number, since it is larger than the sum of its proper divisors (431537523).

1284145197 is an equidigital number, since it uses as much as digits as its factorization.

1284145197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872283.

The product of its digits is 80640, while the sum is 42.

The square root of 1284145197 is about 35834.9717036305. The cubic root of 1284145197 is about 1086.9378457521.

The spelling of 1284145197 in words is "one billion, two hundred eighty-four million, one hundred forty-five thousand, one hundred ninety-seven".