1242080 has 48 divisors (see below), whose sum is σ = 3356640. Its totient is φ = 425472.

The previous prime is 1242067. The next prime is 1242089. The reversal of 1242080 is 802421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242089) 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 7 ways as a sum of consecutive naturals, for example, 566 + ... + 1674.

It is an arithmetic number, because the mean of its divisors is an integer number (69930).

2^1242080 is an apocalyptic number.

1242080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1678320).

1242080 is an abundant number, since it is smaller than the sum of its proper divisors (2114560).

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

1242080 is a wasteful number, since it uses less digits than its factorization.

1242080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1242080 is about 1114.4864288093. The cubic root of 1242080 is about 107.4937440023.

The spelling of 1242080 in words is "one million, two hundred forty-two thousand, eighty".