1281247882 has 16 divisors (see below), whose sum is σ = 1938742272. Its totient is φ = 635009760.

The previous prime is 1281247873. The next prime is 1281247897. The reversal of 1281247882 is 2887421821.

It is a super-2 number, since 2×1281247882² = 3283192270258971848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504957 + ... + 507487.

It is an arithmetic number, because the mean of its divisors is an integer number (121171392).

Almost surely, 2^1281247882 is an apocalyptic number.

1281247882 is a deficient number, since it is larger than the sum of its proper divisors (657494390).

1281247882 is a wasteful number, since it uses less digits than its factorization.

1281247882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4653.

The product of its digits is 114688, while the sum is 43.

The square root of 1281247882 is about 35794.5230726713. The cubic root of 1281247882 is about 1086.1197729630.

The spelling of 1281247882 in words is "one billion, two hundred eighty-one million, two hundred forty-seven thousand, eight hundred eighty-two".