1285447 has 4 divisors (see below), whose sum is σ = 1341360. Its totient is φ = 1229536.

The previous prime is 1285441. The next prime is 1285451. The reversal of 1285447 is 7445821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7445821 = 101 ⋅73721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285441) 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, 27922 + ... + 27967.

It is an arithmetic number, because the mean of its divisors is an integer number (335340).

2^1285447 is an apocalyptic number.

1285447 is a deficient number, since it is larger than the sum of its proper divisors (55913).

1285447 is an equidigital number, since it uses as much as digits as its factorization.

1285447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55912.

The product of its digits is 8960, while the sum is 31.

The square root of 1285447 is about 1133.7755509800. The cubic root of 1285447 is about 108.7305016348.

The spelling of 1285447 in words is "one million, two hundred eighty-five thousand, four hundred forty-seven".