325256921 has 4 divisors (see below), whose sum is σ = 354825744. Its totient is φ = 295688100.

The previous prime is 325256891. The next prime is 325256957. The reversal of 325256921 is 129652523.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 325256921 - 2¹⁰ = 325255897 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (325256521) 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, 14784395 + ... + 14784416.

It is an arithmetic number, because the mean of its divisors is an integer number (88706436).

Almost surely, 2^325256921 is an apocalyptic number.

It is an amenable number.

325256921 is a deficient number, since it is larger than the sum of its proper divisors (29568823).

325256921 is a wasteful number, since it uses less digits than its factorization.

325256921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29568822.

The product of its digits is 32400, while the sum is 35.

The square root of 325256921 is about 18034.8806760677. The cubic root of 325256921 is about 687.7155571349.

The spelling of 325256921 in words is "three hundred twenty-five million, two hundred fifty-six thousand, nine hundred twenty-one".