1285236 has 36 divisors (see below), whose sum is σ = 3421600. Its totient is φ = 405648.

The previous prime is 1285231. The next prime is 1285237. The reversal of 1285236 is 6325821.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285231) 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 11 ways as a sum of consecutive naturals, for example, 256 + ... + 1623.

2^1285236 is an apocalyptic number.

It is an amenable number.

1285236 is an abundant number, since it is smaller than the sum of its proper divisors (2136364).

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

1285236 is a wasteful number, since it uses less digits than its factorization.

1285236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1903 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1285236 is about 1133.6824952340. The cubic root of 1285236 is about 108.7245521114.

It can be divided in two parts, 1285 and 236, that added together give a square (1521 = 39²).

The spelling of 1285236 in words is "one million, two hundred eighty-five thousand, two hundred thirty-six".