1325101556 has 12 divisors (see below), whose sum is σ = 2322483492. Its totient is φ = 661534848.

The previous prime is 1325101529. The next prime is 1325101559. The reversal of 1325101556 is 6551015231.

It can be written as a sum of positive squares in 2 ways, for example, as 642115600 + 682985956 = 25340^2 + 26134^2 .

It is a super-2 number, since 2×1325101556² = 3511788267427242272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325101559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251045 + ... + 256268.

It is an arithmetic number, because the mean of its divisors is an integer number (193540291).

Almost surely, 2^1325101556 is an apocalyptic number.

It is an amenable number.

1325101556 is a deficient number, since it is larger than the sum of its proper divisors (997381936).

1325101556 is a wasteful number, since it uses less digits than its factorization.

1325101556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507970 (or 507968 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1325101556 is about 36401.9443986170. The cubic root of 1325101556 is about 1098.3726780513.

Adding to 1325101556 its reverse (6551015231), we get a palindrome (7876116787).

The spelling of 1325101556 in words is "one billion, three hundred twenty-five million, one hundred one thousand, five hundred fifty-six".