1286442 has 24 divisors (see below), whose sum is σ = 2891616. Its totient is φ = 428652.

The previous prime is 1286419. The next prime is 1286447. The reversal of 1286442 is 2446821.

1286442 is a `hidden beast` number, since 12 + 8 + 644 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1286447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 838 + ... + 1809.

It is an arithmetic number, because the mean of its divisors is an integer number (120484).

2^1286442 is an apocalyptic number.

1286442 is an abundant number, since it is smaller than the sum of its proper divisors (1605174).

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

1286442 is an equidigital number, since it uses as much as digits as its factorization.

1286442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664 (or 2652 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 1286442 is about 1134.2142654719. The cubic root of 1286442 is about 108.7585486740.

It can be divided in two parts, 1286 and 442, that added together give a cube (1728 = 12³).

The spelling of 1286442 in words is "one million, two hundred eighty-six thousand, four hundred forty-two".