1325615281 has 9 divisors (see below), whose sum is σ = 1386632569. Its totient is φ = 1267178836.

The previous prime is 1325615261. The next prime is 1325615287. The reversal of 1325615281 is 1825165231.

The square root of 1325615281 is 36409.

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

It is not a de Polignac number, because 1325615281 - 2¹⁵ = 1325582513 is a prime.

It is a super-2 number, since 2×1325615281² = 3514511746441417922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325615287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 836616 + ... + 838198.

Almost surely, 2^1325615281 is an apocalyptic number.

1325615281 is the 36409-th square number.

1325615281 is the 18205-th centered octagonal number.

It is an amenable number.

1325615281 is a deficient number, since it is larger than the sum of its proper divisors (61017288).

1325615281 is an frugal number, since it uses more digits than its factorization.

1325615281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212 (or 1606 counting only the distinct ones).

The product of its digits is 14400, while the sum is 34.

The cubic root of 1325615281 is about 1098.5146014126.

Multiplying 1325615281 by its product of digits (14400), we get a square (19088860046400 = 4369080²).

The spelling of 1325615281 in words is "one billion, three hundred twenty-five million, six hundred fifteen thousand, two hundred eighty-one".