1287275 has 24 divisors (see below), whose sum is σ = 1809408. Its totient is φ = 900000.

The previous prime is 1287239. The next prime is 1287289. The reversal of 1287275 is 5727821.

It is not a de Polignac number, because 1287275 - 2¹² = 1283179 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 8450 + ... + 8600.

It is an arithmetic number, because the mean of its divisors is an integer number (75392).

2^1287275 is an apocalyptic number.

1287275 is a deficient number, since it is larger than the sum of its proper divisors (522133).

1287275 is a wasteful number, since it uses less digits than its factorization.

1287275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 198 counting only the distinct ones).

The product of its digits is 7840, while the sum is 32.

The square root of 1287275 is about 1134.5814206129. The cubic root of 1287275 is about 108.7820181409.

The spelling of 1287275 in words is "one million, two hundred eighty-seven thousand, two hundred seventy-five".