1242644260 has 96 divisors (see below), whose sum is σ = 3148895232. Its totient is φ = 405803520.

The previous prime is 1242644209. The next prime is 1242644267. The reversal of 1242644260 is 624462421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1242644267) 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 31 ways as a sum of consecutive naturals, for example, 99949 + ... + 111691.

It is an arithmetic number, because the mean of its divisors is an integer number (32800992).

Almost surely, 2^1242644260 is an apocalyptic number.

1242644260 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 1242644260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1574447616).

1242644260 is an abundant number, since it is smaller than the sum of its proper divisors (1906250972).

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

1242644260 is a wasteful number, since it uses less digits than its factorization.

1242644260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11813 (or 11811 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 1242644260 is about 35251.1596972355. The cubic root of 1242644260 is about 1075.1001918515.

The spelling of 1242644260 in words is "one billion, two hundred forty-two million, six hundred forty-four thousand, two hundred sixty".