1281494468 has 12 divisors (see below), whose sum is σ = 2243149692. Its totient is φ = 640594560.

The previous prime is 1281494441. The next prime is 1281494503. The reversal of 1281494468 is 8644941821.

It can be written as a sum of positive squares in 2 ways, for example, as 322849024 + 958645444 = 17968^2 + 30962^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18113 + ... + 53768.

It is an arithmetic number, because the mean of its divisors is an integer number (186929141).

Almost surely, 2^1281494468 is an apocalyptic number.

It is an amenable number.

1281494468 is a deficient number, since it is larger than the sum of its proper divisors (961655224).

1281494468 is a wasteful number, since it uses less digits than its factorization.

1281494468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76342 (or 76340 counting only the distinct ones).

The product of its digits is 442368, while the sum is 47.

The square root of 1281494468 is about 35797.9673724640. The cubic root of 1281494468 is about 1086.1894458589.

The spelling of 1281494468 in words is "one billion, two hundred eighty-one million, four hundred ninety-four thousand, four hundred sixty-eight".