1281000196 has 12 divisors (see below), whose sum is σ = 2562000448. Its totient is φ = 549000072.

The previous prime is 1281000191. The next prime is 1281000221. The reversal of 1281000196 is 6910001821.

It is a happy number.

1281000196 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 45750007 = 1281000196 / (1 + 2 + 8 + 1 + 0 + 0 + 0 + 1 + 9 + 6).

It is not an unprimeable number, because it can be changed into a prime (1281000191) 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 3 ways as a sum of consecutive naturals, for example, 22874976 + ... + 22875031.

Almost surely, 2^1281000196 is an apocalyptic number.

It is an amenable number.

1281000196 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1281000196 is a wasteful number, since it uses less digits than its factorization.

1281000196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45750018 (or 45750016 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 1281000196 is about 35791.0630744604. The cubic root of 1281000196 is about 1086.0497802622.

The spelling of 1281000196 in words is "one billion, two hundred eighty-one million, one hundred ninety-six", and thus it is an aban number.