255942521 has 8 divisors (see below), whose sum is σ = 269762400. Its totient is φ = 242157600.

The previous prime is 255942509. The next prime is 255942527. The reversal of 255942521 is 125249552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255942521 is a prime.

It is a super-4 number, since 4×255942521⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255942527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7046 + ... + 23696.

It is an arithmetic number, because the mean of its divisors is an integer number (33720300).

Almost surely, 2^255942521 is an apocalyptic number.

It is an amenable number.

255942521 is a deficient number, since it is larger than the sum of its proper divisors (13819879).

255942521 is a wasteful number, since it uses less digits than its factorization.

255942521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17479.

The product of its digits is 36000, while the sum is 35.

The square root of 255942521 is about 15998.2036804136. The cubic root of 255942521 is about 634.9128952380.

The spelling of 255942521 in words is "two hundred fifty-five million, nine hundred forty-two thousand, five hundred twenty-one".