1285583 has 6 divisors (see below), whose sum is σ = 1392264. Its totient is φ = 1186536.

The previous prime is 1285553. The next prime is 1285607. The reversal of 1285583 is 3855821.

It is a happy number.

It is not a de Polignac number, because 1285583 - 2⁶ = 1285519 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 (1285513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3635 + ... + 3972.

It is an arithmetic number, because the mean of its divisors is an integer number (232044).

2^1285583 is an apocalyptic number.

1285583 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1285583 is a deficient number, since it is larger than the sum of its proper divisors (106681).

1285583 is an equidigital number, since it uses as much as digits as its factorization.

1285583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7633 (or 7620 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The square root of 1285583 is about 1133.8355259913. The cubic root of 1285583 is about 108.7343360537.

The spelling of 1285583 in words is "one million, two hundred eighty-five thousand, five hundred eighty-three".