1287575 has 6 divisors (see below), whose sum is σ = 1596624. Its totient is φ = 1030040.

The previous prime is 1287569. The next prime is 1287589. The reversal of 1287575 is 5757821.

It is not a de Polignac number, because 1287575 - 2⁶ = 1287511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25727 + ... + 25776.

It is an arithmetic number, because the mean of its divisors is an integer number (266104).

2^1287575 is an apocalyptic number.

1287575 is a deficient number, since it is larger than the sum of its proper divisors (309049).

1287575 is an equidigital number, since it uses as much as digits as its factorization.

1287575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51513 (or 51508 counting only the distinct ones).

The product of its digits is 19600, while the sum is 35.

The square root of 1287575 is about 1134.7136202584. The cubic root of 1287575 is about 108.7904680501.

The spelling of 1287575 in words is "one million, two hundred eighty-seven thousand, five hundred seventy-five".