1285944 has 32 divisors (see below), whose sum is σ = 3507840. Its totient is φ = 389600.

The previous prime is 1285943. The next prime is 1285969. The reversal of 1285944 is 4495821.

It is a super-2 number, since 2×1285944² = 3307303942272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2172 + ... + 2699.

It is an arithmetic number, because the mean of its divisors is an integer number (109620).

2^1285944 is an apocalyptic number.

It is an amenable number.

1285944 is an abundant number, since it is smaller than the sum of its proper divisors (2221896).

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

1285944 is a wasteful number, since it uses less digits than its factorization.

1285944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4891 (or 4887 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 1285944 is about 1133.9947089824. The cubic root of 1285944 is about 108.7445128689.

The spelling of 1285944 in words is "one million, two hundred eighty-five thousand, nine hundred forty-four".