1242784 has 24 divisors (see below), whose sum is σ = 2485728. Its totient is φ = 611520.

The previous prime is 1242781. The next prime is 1242803. The reversal of 1242784 is 4872421.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1242781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1999 + ... + 2545.

It is an arithmetic number, because the mean of its divisors is an integer number (103572).

2^1242784 is an apocalyptic number.

It is an amenable number.

1242784 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1242784 is an equidigital number, since it uses as much as digits as its factorization.

1242784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 620 counting only the distinct ones).

The product of its digits is 3584, while the sum is 28.

The square root of 1242784 is about 1114.8022246121. The cubic root of 1242784 is about 107.5140490022.

The spelling of 1242784 in words is "one million, two hundred forty-two thousand, seven hundred eighty-four".