1281140199 has 8 divisors (see below), whose sum is σ = 1897985520. Its totient is φ = 854093448.

The previous prime is 1281140183. The next prime is 1281140251. The reversal of 1281140199 is 9910411821.

It is not a de Polignac number, because 1281140199 - 2⁴ = 1281140183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281140149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23724792 + ... + 23724845.

It is an arithmetic number, because the mean of its divisors is an integer number (237248190).

Almost surely, 2^1281140199 is an apocalyptic number.

1281140199 is a deficient number, since it is larger than the sum of its proper divisors (616845321).

1281140199 is an equidigital number, since it uses as much as digits as its factorization.

1281140199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47449646 (or 47449640 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1281140199 is about 35793.0188584310. The cubic root of 1281140199 is about 1086.0893443177.

The spelling of 1281140199 in words is "one billion, two hundred eighty-one million, one hundred forty thousand, one hundred ninety-nine".