1285873 has 8 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 1242000.

The previous prime is 1285871. The next prime is 1285877. The reversal of 1285873 is 3785821.

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 1285873 - 2¹ = 1285871 is a prime.

It is a Duffinian number.

1285873 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1285871) 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, 4998 + ... + 5248.

It is an arithmetic number, because the mean of its divisors is an integer number (166320).

2^1285873 is an apocalyptic number.

It is an amenable number.

1285873 is a deficient number, since it is larger than the sum of its proper divisors (44687).

1285873 is a wasteful number, since it uses less digits than its factorization.

1285873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407.

The product of its digits is 13440, while the sum is 34.

The square root of 1285873 is about 1133.9634032895. The cubic root of 1285873 is about 108.7425114851.

The spelling of 1285873 in words is "one million, two hundred eighty-five thousand, eight hundred seventy-three".