1242459660 has 96 divisors (see below), whose sum is σ = 3757178880.
Its totient is φ = 304964352.
The previous prime is 1242459653. The next prime is 1242459661. The reversal of 1242459660 is 669542421.
It is a happy number.
It is a Harshad number since it is a multiple of its sum of digits (39).
It is not an unprimeable number, because it can be changed into a prime (1242459661) 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, 296661 + ... + 300819.
It is an arithmetic number, because the mean of its divisors is an integer number (39137280).
Almost surely, 21242459660 is an apocalyptic number.
1242459660 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 1242459660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878589440).
1242459660 is an abundant number, since it is smaller than the sum of its proper divisors (2514719220).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1242459660 is a wasteful number, since it uses less digits than its factorization.
1242459660 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4567 (or 4565 counting only the distinct ones).
The product of its (nonzero) digits is 103680, while the sum is 39.
The square root of 1242459660 is about 35248.5412464119.
The cubic root of 1242459660 is about 1075.0469523390.
The spelling of 1242459660 in words is "one billion, two hundred forty-two million, four hundred fifty-nine thousand, six hundred sixty".