1281246288 has 40 divisors (see below), whose sum is σ = 3782728128. Its totient is φ = 366070272.

The previous prime is 1281246283. The next prime is 1281246299. The reversal of 1281246288 is 8826421821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281246283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1906281 + ... + 1906952.

Almost surely, 2^1281246288 is an apocalyptic number.

It is an amenable number.

1281246288 is an abundant number, since it is smaller than the sum of its proper divisors (2501481840).

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

1281246288 is a wasteful number, since it uses less digits than its factorization.

1281246288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813251 (or 3813245 counting only the distinct ones).

The product of its digits is 98304, while the sum is 42.

The square root of 1281246288 is about 35794.5008066882. The cubic root of 1281246288 is about 1086.1193225491.

The spelling of 1281246288 in words is "one billion, two hundred eighty-one million, two hundred forty-six thousand, two hundred eighty-eight".