1247467872 has 72 divisors (see below), whose sum is σ = 3809246616. Its totient is φ = 356418048.

The previous prime is 1247467849. The next prime is 1247467981. The reversal of 1247467872 is 2787647421.

It is a Harshad number since it is a multiple of its sum of digits (48).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127893 + ... + 137300.

It is an arithmetic number, because the mean of its divisors is an integer number (52906203).

Almost surely, 2^1247467872 is an apocalyptic number.

1247467872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1247467872 is an abundant number, since it is smaller than the sum of its proper divisors (2561778744).

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

1247467872 is a wasteful number, since it uses less digits than its factorization.

1247467872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265220 (or 265205 counting only the distinct ones).

The product of its digits is 1053696, while the sum is 48.

The square root of 1247467872 is about 35319.5112083958. The cubic root of 1247467872 is about 1076.4894793944.

The spelling of 1247467872 in words is "one billion, two hundred forty-seven million, four hundred sixty-seven thousand, eight hundred seventy-two".