1247258012 has 96 divisors (see below), whose sum is σ = 3010183680. Its totient is φ = 436389120.

The previous prime is 1247257993. The next prime is 1247258017. The reversal of 1247258012 is 2108527421.

It is a self number, because there is not a number n which added to its sum of digits gives 1247258012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247258017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143939 + ... + 152357.

It is an arithmetic number, because the mean of its divisors is an integer number (31356080).

Almost surely, 2^1247258012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1247258012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1505091840).

1247258012 is an abundant number, since it is smaller than the sum of its proper divisors (1762925668).

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

1247258012 is a wasteful number, since it uses less digits than its factorization.

1247258012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8491 (or 8489 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 1247258012 is about 35316.5402042726. The cubic root of 1247258012 is about 1076.4291105045.

The spelling of 1247258012 in words is "one billion, two hundred forty-seven million, two hundred fifty-eight thousand, twelve".