1247995134 has 64 divisors (see below), whose sum is σ = 2948659200. Its totient is φ = 390383136.

The previous prime is 1247995129. The next prime is 1247995169. The reversal of 1247995134 is 4315997421.

1247995134 is a `hidden beast` number, since 1 + 2 + 47 + 99 + 513 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1247995134.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56347 + ... + 75305.

It is an arithmetic number, because the mean of its divisors is an integer number (46072800).

Almost surely, 2^1247995134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1247995134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1474329600).

1247995134 is an abundant number, since it is smaller than the sum of its proper divisors (1700664066).

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

1247995134 is a wasteful number, since it uses less digits than its factorization.

1247995134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19046 (or 19040 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 1247995134 is about 35326.9745944937. The cubic root of 1247995134 is about 1076.6411231254.

The spelling of 1247995134 in words is "one billion, two hundred forty-seven million, nine hundred ninety-five thousand, one hundred thirty-four".