1285039 has 4 divisors (see below), whose sum is σ = 1468624. Its totient is φ = 1101456.

The previous prime is 1285021. The next prime is 1285049. The reversal of 1285039 is 9305821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1285039 - 2¹⁷ = 1153967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1284998 and 1285016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91782 + ... + 91795.

It is an arithmetic number, because the mean of its divisors is an integer number (367156).

2^1285039 is an apocalyptic number.

1285039 is a deficient number, since it is larger than the sum of its proper divisors (183585).

1285039 is an equidigital number, since it uses as much as digits as its factorization.

1285039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183584.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1285039 is about 1133.5956069075. The cubic root of 1285039 is about 108.7189967552.

The spelling of 1285039 in words is "one million, two hundred eighty-five thousand, thirty-nine".