1281884 has 6 divisors (see below), whose sum is σ = 2243304. Its totient is φ = 640940.

The previous prime is 1281883. The next prime is 1281899. The reversal of 1281884 is 4881821.

1281884 is nontrivially palindromic in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 1281884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160232 + ... + 160239.

It is an arithmetic number, because the mean of its divisors is an integer number (373884).

2^1281884 is an apocalyptic number.

It is an amenable number.

1281884 is a deficient number, since it is larger than the sum of its proper divisors (961420).

1281884 is a wasteful number, since it uses less digits than its factorization.

1281884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320475 (or 320473 counting only the distinct ones).

The product of its digits is 4096, while the sum is 32.

The square root of 1281884 is about 1132.2031619811. The cubic root of 1281884 is about 108.6299489951.

The spelling of 1281884 in words is "one million, two hundred eighty-one thousand, eight hundred eighty-four".