1247916852 has 144 divisors (see below), whose sum is σ = 3907368192. Its totient is φ = 327006720.

The previous prime is 1247916829. The next prime is 1247916883. The reversal of 1247916852 is 2586197421.

1247916852 is a `hidden beast` number, since 12 + 479 + 168 + 5 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1247916798 and 1247916807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 545952 + ... + 548232.

Almost surely, 2^1247916852 is an apocalyptic number.

1247916852 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 1247916852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1953684096).

1247916852 is an abundant number, since it is smaller than the sum of its proper divisors (2659451340).

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

1247916852 is a wasteful number, since it uses less digits than its factorization.

1247916852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478 (or 2473 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 1247916852 is about 35325.8666135737. The cubic root of 1247916852 is about 1076.6186114504.

The spelling of 1247916852 in words is "one billion, two hundred forty-seven million, nine hundred sixteen thousand, eight hundred fifty-two".