1281828 has 24 divisors (see below), whose sum is σ = 3072832. Its totient is φ = 415584.

The previous prime is 1281827. The next prime is 1281853. The reversal of 1281828 is 8281821.

It is a junction number, because it is equal to n+sod(n) for n = 1281795 and 1281804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281821) 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, 1000 + ... + 1887.

2^1281828 is an apocalyptic number.

It is an amenable number.

1281828 is an abundant number, since it is smaller than the sum of its proper divisors (1791004).

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

1281828 is a wasteful number, since it uses less digits than its factorization.

1281828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931 (or 2929 counting only the distinct ones).

The product of its digits is 2048, while the sum is 30.

The square root of 1281828 is about 1132.1784311671. The cubic root of 1281828 is about 108.6283671136.

The spelling of 1281828 in words is "one million, two hundred eighty-one thousand, eight hundred twenty-eight".