1285384 has 32 divisors (see below), whose sum is σ = 2557440. Its totient is φ = 604800.

The previous prime is 1285381. The next prime is 1285393. The reversal of 1285384 is 4835821.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1285381) 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, 17572 + ... + 17644.

It is an arithmetic number, because the mean of its divisors is an integer number (79920).

2^1285384 is an apocalyptic number.

It is an amenable number.

1285384 is a deficient number, since it is larger than the sum of its proper divisors (1272056).

1285384 is a wasteful number, since it uses less digits than its factorization.

1285384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 177 counting only the distinct ones).

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

The square root of 1285384 is about 1133.7477673627. The cubic root of 1285384 is about 108.7287253050.

The spelling of 1285384 in words is "one million, two hundred eighty-five thousand, three hundred eighty-four".