1263285 has 24 divisors (see below), whose sum is σ = 2227680. Its totient is φ = 662112.

The previous prime is 1263263. The next prime is 1263299. The reversal of 1263285 is 5823621.

It is a de Polignac number, because none of the positive numbers 2^k-1263285 is a prime.

It is a Curzon number.

1263285 is a lucky number.

It is a congruent number.

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, 2806 + ... + 3224.

It is an arithmetic number, because the mean of its divisors is an integer number (92820).

2^1263285 is an apocalyptic number.

1263285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1263285 is a deficient number, since it is larger than the sum of its proper divisors (964395).

1263285 is a wasteful number, since it uses less digits than its factorization.

1263285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 494 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1263285 is about 1123.9595188440. The cubic root of 1263285 is about 108.1020126659.

The spelling of 1263285 in words is "one million, two hundred sixty-three thousand, two hundred eighty-five".