1325656321 has 8 divisors (see below), whose sum is σ = 1481443488. Its totient is φ = 1175748000.

The previous prime is 1325656307. The next prime is 1325656327. The reversal of 1325656321 is 1236565231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1325656321 - 2⁵ = 1325656289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1325656327) 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 7 ways as a sum of consecutive naturals, for example, 1469235 + ... + 1470136.

It is an arithmetic number, because the mean of its divisors is an integer number (185180436).

Almost surely, 2^1325656321 is an apocalyptic number.

1325656321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1325656321 is a deficient number, since it is larger than the sum of its proper divisors (155787167).

1325656321 is a wasteful number, since it uses less digits than its factorization.

1325656321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939423.

The product of its digits is 32400, while the sum is 34.

The square root of 1325656321 is about 36409.5635925508. The cubic root of 1325656321 is about 1098.5259376765.

The spelling of 1325656321 in words is "one billion, three hundred twenty-five million, six hundred fifty-six thousand, three hundred twenty-one".