6147971281 has 9 divisors (see below), whose sum is σ = 6224891473. Its totient is φ = 6071992960.

The previous prime is 6147971237. The next prime is 6147971287. The reversal of 6147971281 is 1821797416.

It is a happy number.

The square root of 6147971281 is 78409.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2461052881 + 3686918400 = 49609^2 + 60720^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6147971281 is a prime.

It is a super-2 number, since 2×6147971281² = 75595101744001561922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6147971287) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 6977961 + ... + 6978841.

Almost surely, 2^6147971281 is an apocalyptic number.

6147971281 is the 78409-th square number.

6147971281 is the 39205-th centered octagonal number.

It is an amenable number.

6147971281 is a deficient number, since it is larger than the sum of its proper divisors (76920192).

6147971281 is an frugal number, since it uses more digits than its factorization.

6147971281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940 (or 970 counting only the distinct ones).

The product of its digits is 169344, while the sum is 46.

The cubic root of 6147971281 is about 1831.9373195797.

The spelling of 6147971281 in words is "six billion, one hundred forty-seven million, nine hundred seventy-one thousand, two hundred eighty-one".