1247671424 has 48 divisors (see below), whose sum is σ = 2519166930. Its totient is φ = 615456768.

The previous prime is 1247671421. The next prime is 1247671441. The reversal of 1247671424 is 4241767421.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 404814400 + 842857024 = 20120^2 + 29032^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247671421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3935714 + ... + 3936030.

Almost surely, 2^1247671424 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 1247671424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259583465).

1247671424 is an abundant number, since it is smaller than the sum of its proper divisors (1271495506).

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

1247671424 is an frugal number, since it uses more digits than its factorization.

1247671424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 416 counting only the distinct ones).

The product of its digits is 75264, while the sum is 38.

The square root of 1247671424 is about 35322.3926709389. The cubic root of 1247671424 is about 1076.5480272401.

The spelling of 1247671424 in words is "one billion, two hundred forty-seven million, six hundred seventy-one thousand, four hundred twenty-four".