1281402268 has 12 divisors (see below), whose sum is σ = 2374363152. Its totient is φ = 603012800.

The previous prime is 1281402229. The next prime is 1281402271. The reversal of 1281402268 is 8622041821.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9422008 + ... + 9422143.

It is an arithmetic number, because the mean of its divisors is an integer number (197863596).

Almost surely, 2^1281402268 is an apocalyptic number.

It is an amenable number.

1281402268 is a deficient number, since it is larger than the sum of its proper divisors (1092960884).

1281402268 is a wasteful number, since it uses less digits than its factorization.

1281402268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18844172 (or 18844170 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 1281402268 is about 35796.6795666861. The cubic root of 1281402268 is about 1086.1633957870.

The spelling of 1281402268 in words is "one billion, two hundred eighty-one million, four hundred two thousand, two hundred sixty-eight".