1247349012 has 192 divisors, whose sum is σ = 3823411200. Its totient is φ = 307307520.

The previous prime is 1247348981. The next prime is 1247349013. The reversal of 1247349012 is 2109437421.

It is a super-2 number, since 2×1247349012² = 3111759115474752288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247349013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1638712 + ... + 1639472.

It is an arithmetic number, because the mean of its divisors is an integer number (19913600).

Almost surely, 2^1247349012 is an apocalyptic number.

1247349012 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 1247349012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1911705600).

1247349012 is an abundant number, since it is smaller than the sum of its proper divisors (2576062188).

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

1247349012 is a wasteful number, since it uses less digits than its factorization.

1247349012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 884 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1247349012 is about 35317.8285289455. The cubic root of 1247349012 is about 1076.4552886398.

The spelling of 1247349012 in words is "one billion, two hundred forty-seven million, three hundred forty-nine thousand, twelve".