1325251565 has 16 divisors (see below), whose sum is σ = 1759314816. Its totient is φ = 950241600.

The previous prime is 1325251561. The next prime is 1325251579. The reversal of 1325251565 is 5651525231.

It is not a de Polignac number, because 1325251565 - 2² = 1325251561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325251561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165782 + ... + 173591.

It is an arithmetic number, because the mean of its divisors is an integer number (109957176).

Almost surely, 2^1325251565 is an apocalyptic number.

It is an amenable number.

1325251565 is a deficient number, since it is larger than the sum of its proper divisors (434063251).

1325251565 is a wasteful number, since it uses less digits than its factorization.

1325251565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339460.

The product of its digits is 45000, while the sum is 35.

The square root of 1325251565 is about 36404.0047934290. The cubic root of 1325251565 is about 1098.4141238231.

Adding to 1325251565 its reverse (5651525231), we get a palindrome (6976776796).

The spelling of 1325251565 in words is "one billion, three hundred twenty-five million, two hundred fifty-one thousand, five hundred sixty-five".