1285744 has 40 divisors (see below), whose sum is σ = 2745360. Its totient is φ = 580608.

The previous prime is 1285741. The next prime is 1285747. The reversal of 1285744 is 4475821.

It is an interprime number because it is at equal distance from previous prime (1285741) and next prime (1285747).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7807 + ... + 7969.

It is an arithmetic number, because the mean of its divisors is an integer number (68634).

2^1285744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1372680).

1285744 is an abundant number, since it is smaller than the sum of its proper divisors (1459616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285744 is a wasteful number, since it uses less digits than its factorization.

1285744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 211 counting only the distinct ones).

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

The square root of 1285744 is about 1133.9065217204. The cubic root of 1285744 is about 108.7388749795.

The spelling of 1285744 in words is "one million, two hundred eighty-five thousand, seven hundred forty-four".