1281384846 has 60 divisors (see below), whose sum is σ = 3284519832. Its totient is φ = 365765544.

The previous prime is 1281384817. The next prime is 1281384847. The reversal of 1281384846 is 6484831821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281384847) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1204911 + ... + 1205973.

Almost surely, 2^1281384846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1281384846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1642259916).

1281384846 is an abundant number, since it is smaller than the sum of its proper divisors (2003134986).

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

1281384846 is an frugal number, since it uses more digits than its factorization.

1281384846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147 (or 1075 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 1281384846 is about 35796.4362192663. The cubic root of 1281384846 is about 1086.1584732567.

The spelling of 1281384846 in words is "one billion, two hundred eighty-one million, three hundred eighty-four thousand, eight hundred forty-six".