1287422 has 8 divisors (see below), whose sum is σ = 1939872. Its totient is φ = 640800.

The previous prime is 1287401. The next prime is 1287431. The reversal of 1287422 is 2247821.

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

It is a junction number, because it is equal to n+sod(n) for n = 1287391 and 1287400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854 + ... + 1817.

It is an arithmetic number, because the mean of its divisors is an integer number (242484).

2^1287422 is an apocalyptic number.

1287422 is a deficient number, since it is larger than the sum of its proper divisors (652450).

1287422 is a wasteful number, since it uses less digits than its factorization.

1287422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914.

The product of its digits is 1792, while the sum is 26.

The square root of 1287422 is about 1134.6462003638. The cubic root of 1287422 is about 108.7861587604.

The spelling of 1287422 in words is "one million, two hundred eighty-seven thousand, four hundred twenty-two".