1247843130 has 64 divisors (see below), whose sum is σ = 3133945728. Its totient is φ = 317640960.

The previous prime is 1247843119. The next prime is 1247843143. The reversal of 1247843130 is 313487421.

It is a super-2 number, since 2×1247843130² = 3114224954176393800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1247843091 and 1247843100.

It is an unprimeable number.

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, 48225 + ... + 69435.

It is an arithmetic number, because the mean of its divisors is an integer number (48967902).

Almost surely, 2^1247843130 is an apocalyptic number.

1247843130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1247843130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1566972864).

1247843130 is an abundant number, since it is smaller than the sum of its proper divisors (1886102598).

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

1247843130 is a wasteful number, since it uses less digits than its factorization.

1247843130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21311.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 1247843130 is about 35324.8231418078. The cubic root of 1247843130 is about 1076.5974102408.

The spelling of 1247843130 in words is "one billion, two hundred forty-seven million, eight hundred forty-three thousand, one hundred thirty".