1247900472 has 128 divisors (see below), whose sum is σ = 4266393600. Its totient is φ = 329111424.

The previous prime is 1247900461. The next prime is 1247900497. The reversal of 1247900472 is 2740097421.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12088 + ... + 51399.

It is an arithmetic number, because the mean of its divisors is an integer number (33331200).

Almost surely, 2^1247900472 is an apocalyptic number.

1247900472 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 1247900472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2133196800).

1247900472 is an abundant number, since it is smaller than the sum of its proper divisors (3018493128).

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

1247900472 is a wasteful number, since it uses less digits than its factorization.

1247900472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63522 (or 63512 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 1247900472 is about 35325.6347713668. The cubic root of 1247900472 is about 1076.6139009095.

Adding to 1247900472 its reverse (2740097421), we get a palindrome (3987997893).

The spelling of 1247900472 in words is "one billion, two hundred forty-seven million, nine hundred thousand, four hundred seventy-two".