1285045 has 8 divisors (see below), whose sum is σ = 1552824. Its totient is φ = 1020864.

The previous prime is 1285021. The next prime is 1285049. The reversal of 1285045 is 5405821.

It can be written as a sum of positive squares in 4 ways, for example, as 10404 + 1274641 = 102^2 + 1129^2 .

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 1285045 - 2⁷ = 1284917 is a prime.

It is a Duffinian number.

1285045 is a lucky number.

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 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, 34 + ... + 1603.

It is an arithmetic number, because the mean of its divisors is an integer number (194103).

2^1285045 is an apocalyptic number.

It is an amenable number.

1285045 is a deficient number, since it is larger than the sum of its proper divisors (267779).

1285045 is a wasteful number, since it uses less digits than its factorization.

1285045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1285045 is about 1133.5982533508. The cubic root of 1285045 is about 108.7191659622.

The spelling of 1285045 in words is "one million, two hundred eighty-five thousand, forty-five".