1275287 has 8 divisors (see below), whose sum is σ = 1382304. Its totient is φ = 1169568.

The previous prime is 1275283. The next prime is 1275293. The reversal of 1275287 is 7825721.

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

It is a cyclic number.

It is not a de Polignac number, because 1275287 - 2² = 1275283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275283) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3233 + ... + 3605.

It is an arithmetic number, because the mean of its divisors is an integer number (172788).

2^1275287 is an apocalyptic number.

1275287 is a deficient number, since it is larger than the sum of its proper divisors (107017).

1275287 is a wasteful number, since it uses less digits than its factorization.

1275287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

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

The square root of 1275287 is about 1129.2860576488. The cubic root of 1275287 is about 108.4432798316.

The spelling of 1275287 in words is "one million, two hundred seventy-five thousand, two hundred eighty-seven".