1284642 has 48 divisors (see below), whose sum is σ = 3032640. Its totient is φ = 391776.

The previous prime is 1284641. The next prime is 1284659. The reversal of 1284642 is 2464821.

1284642 is a `hidden beast` number, since 12 + 8 + 4 + 642 = 666.

It is not an unprimeable number, because it can be changed into a prime (1284641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11953 + ... + 12059.

It is an arithmetic number, because the mean of its divisors is an integer number (63180).

2^1284642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1284642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1516320).

1284642 is an abundant number, since it is smaller than the sum of its proper divisors (1747998).

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

1284642 is a wasteful number, since it uses less digits than its factorization.

1284642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 164 counting only the distinct ones).

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

The square root of 1284642 is about 1133.4204868450. The cubic root of 1284642 is about 108.7077997183.

The spelling of 1284642 in words is "one million, two hundred eighty-four thousand, six hundred forty-two".