1247790852 has 192 divisors, whose sum is σ = 4057159680. Its totient is φ = 322185600.

The previous prime is 1247790847. The next prime is 1247790877. The reversal of 1247790852 is 2580977421.

It is a happy number.

1247790852 is a `hidden beast` number, since 12 + 477 + 90 + 85 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1247790798 and 1247790807.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1887402 + ... + 1888062.

It is an arithmetic number, because the mean of its divisors is an integer number (21131040).

Almost surely, 2^1247790852 is an apocalyptic number.

1247790852 is a gapful number since it is divisible by the number (12) 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 1247790852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2028579840).

1247790852 is an abundant number, since it is smaller than the sum of its proper divisors (2809368828).

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

1247790852 is a wasteful number, since it uses less digits than its factorization.

1247790852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919 (or 911 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 1247790852 is about 35324.0831728157. The cubic root of 1247790852 is about 1076.5823754596.

The spelling of 1247790852 in words is "one billion, two hundred forty-seven million, seven hundred ninety thousand, eight hundred fifty-two".