325128961 has 8 divisors (see below), whose sum is σ = 355359744. Its totient is φ = 296132160.

The previous prime is 325128959. The next prime is 325128967. The reversal of 325128961 is 169821523.

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 325128961 - 2¹ = 325128959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 325128961.

It is not an unprimeable number, because it can be changed into a prime (325128967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307945 + ... + 308998.

It is an arithmetic number, because the mean of its divisors is an integer number (44419968).

Almost surely, 2^325128961 is an apocalyptic number.

325128961 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

325128961 is a deficient number, since it is larger than the sum of its proper divisors (30230783).

325128961 is a wasteful number, since it uses less digits than its factorization.

325128961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616991.

The product of its digits is 25920, while the sum is 37.

The square root of 325128961 is about 18031.3327571758. The cubic root of 325128961 is about 687.6253601044.

It can be divided in two parts, 325 and 128961, that added together give a triangular number (129286 = T₅₀₈).

The spelling of 325128961 in words is "three hundred twenty-five million, one hundred twenty-eight thousand, nine hundred sixty-one".