1242395080 has 64 divisors (see below), whose sum is σ = 2857536000. Its totient is φ = 486031104.

The previous prime is 1242395057. The next prime is 1242395081. The reversal of 1242395080 is 805932421.

It is not an unprimeable number, because it can be changed into a prime (1242395081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342637 + ... + 346243.

It is an arithmetic number, because the mean of its divisors is an integer number (44649000).

Almost surely, 2^1242395080 is an apocalyptic number.

1242395080 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 1242395080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1428768000).

1242395080 is an abundant number, since it is smaller than the sum of its proper divisors (1615140920).

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

1242395080 is a wasteful number, since it uses less digits than its factorization.

1242395080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806 (or 3802 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1242395080 is about 35247.6251682294. The cubic root of 1242395080 is about 1075.0283259167.

The spelling of 1242395080 in words is "one billion, two hundred forty-two million, three hundred ninety-five thousand, eighty".