1281994 has 8 divisors (see below), whose sum is σ = 2197728. Its totient is φ = 549420.

The previous prime is 1281983. The next prime is 1282007. The reversal of 1281994 is 4991821.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45772 + ... + 45799.

It is an arithmetic number, because the mean of its divisors is an integer number (274716).

2^1281994 is an apocalyptic number.

1281994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1281994 is a deficient number, since it is larger than the sum of its proper divisors (915734).

1281994 is an equidigital number, since it uses as much as digits as its factorization.

1281994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91580.

The product of its digits is 5184, while the sum is 34.

The square root of 1281994 is about 1132.2517387931. The cubic root of 1281994 is about 108.6330561282.

The spelling of 1281994 in words is "one million, two hundred eighty-one thousand, nine hundred ninety-four".