1285438 has 32 divisors (see below), whose sum is σ = 2550528. Its totient is φ = 470400.

The previous prime is 1285429. The next prime is 1285441. The reversal of 1285438 is 8345821.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2373 + ... + 2863.

It is an arithmetic number, because the mean of its divisors is an integer number (79704).

2^1285438 is an apocalyptic number.

1285438 is a deficient number, since it is larger than the sum of its proper divisors (1265090).

1285438 is a wasteful number, since it uses less digits than its factorization.

1285438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528.

The product of its digits is 7680, while the sum is 31.

The square root of 1285438 is about 1133.7715819335. The cubic root of 1285438 is about 108.7302478770.

The spelling of 1285438 in words is "one million, two hundred eighty-five thousand, four hundred thirty-eight".