1287122 has 8 divisors (see below), whose sum is σ = 1938816. Its totient is φ = 640852.

The previous prime is 1287109. The next prime is 1287131. The reversal of 1287122 is 2217821.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698 + ... + 1749.

It is an arithmetic number, because the mean of its divisors is an integer number (242352).

2^1287122 is an apocalyptic number.

1287122 is a deficient number, since it is larger than the sum of its proper divisors (651694).

1287122 is a wasteful number, since it uses less digits than its factorization.

1287122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712.

The product of its digits is 448, while the sum is 23.

The square root of 1287122 is about 1134.5139928621. The cubic root of 1287122 is about 108.7777081817. Note that the first 4 decimals are identical.

The spelling of 1287122 in words is "one million, two hundred eighty-seven thousand, one hundred twenty-two".