1242816 has 28 divisors (see below), whose sum is σ = 3288792. Its totient is φ = 414208.

The previous prime is 1242811. The next prime is 1242817. The reversal of 1242816 is 6182421.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1242811) 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, 3045 + ... + 3428.

2^1242816 is an apocalyptic number.

1242816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1242816 is an abundant number, since it is smaller than the sum of its proper divisors (2045976).

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

1242816 is an equidigital number, since it uses as much as digits as its factorization.

1242816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6488 (or 6478 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 1242816 is about 1114.8165768412. The cubic root of 1242816 is about 107.5149717745.

The spelling of 1242816 in words is "one million, two hundred forty-two thousand, eight hundred sixteen".