1325271636 has 54 divisors (see below), whose sum is σ = 3627522990. Its totient is φ = 407774016.

The previous prime is 1325271617. The next prime is 1325271671. The reversal of 1325271636 is 6361725231.

1325271636 is a `hidden beast` number, since 1 + 325 + 271 + 63 + 6 = 666.

1325271636 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 14107536 + 1311164100 = 3756^2 + 36210^2 .

It is a super-2 number, since 2×1325271636² = 3512689818372232992, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1325271636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 102831 + ... + 114998.

Almost surely, 2^1325271636 is an apocalyptic number.

It is an amenable number.

1325271636 is an abundant number, since it is smaller than the sum of its proper divisors (2302251354).

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

1325271636 is a wasteful number, since it uses less digits than its factorization.

1325271636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217865 (or 217847 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 1325271636 is about 36404.2804626049. The cubic root of 1325271636 is about 1098.4196689737.

Adding to 1325271636 its reverse (6361725231), we get a palindrome (7686996867).

The spelling of 1325271636 in words is "one billion, three hundred twenty-five million, two hundred seventy-one thousand, six hundred thirty-six".