1247481312 has 96 divisors (see below), whose sum is σ = 4082690304. Its totient is φ = 324019200.

The previous prime is 1247481281. The next prime is 1247481317. The reversal of 1247481312 is 2131847421.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247481317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76989 + ... + 91772.

It is an arithmetic number, because the mean of its divisors is an integer number (42528024).

Almost surely, 2^1247481312 is an apocalyptic number.

1247481312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1247481312 is an abundant number, since it is smaller than the sum of its proper divisors (2835208992).

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

1247481312 is a wasteful number, since it uses less digits than its factorization.

1247481312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168792 (or 168784 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 1247481312 is about 35319.7014709921. The cubic root of 1247481312 is about 1076.4933453501.

The spelling of 1247481312 in words is "one billion, two hundred forty-seven million, four hundred eighty-one thousand, three hundred twelve".