1285456 has 10 divisors (see below), whose sum is σ = 2490602. Its totient is φ = 642720.

The previous prime is 1285451. The next prime is 1285469. The reversal of 1285456 is 6545821.

It can be written as a sum of positive squares in only one way, i.e., 1245456 + 40000 = 1116^2 + 200^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40155 + ... + 40186.

2^1285456 is an apocalyptic number.

1285456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1285456 is a deficient number, since it is larger than the sum of its proper divisors (1205146).

1285456 is an equidigital number, since it uses as much as digits as its factorization.

1285456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80349 (or 80343 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 1285456 is about 1133.7795200126. The cubic root of 1285456 is about 108.7307553915.

The spelling of 1285456 in words is "one million, two hundred eighty-five thousand, four hundred fifty-six".