1281894 has 8 divisors (see below), whose sum is σ = 2563800. Its totient is φ = 427296.

The previous prime is 1281883. The next prime is 1281899. The reversal of 1281894 is 4981821.

It is a sphenic number, since it is the product of 3 distinct primes.

1281894 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106819 + ... + 106830.

It is an arithmetic number, because the mean of its divisors is an integer number (320475).

2^1281894 is an apocalyptic number.

1281894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1281894 is a wasteful number, since it uses less digits than its factorization.

1281894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213654.

The product of its digits is 4608, while the sum is 33.

The square root of 1281894 is about 1132.2075781410. The cubic root of 1281894 is about 108.6302314691.

The spelling of 1281894 in words is "one million, two hundred eighty-one thousand, eight hundred ninety-four".