254521 has 4 divisors (see below), whose sum is σ = 256000. Its totient is φ = 253044.

The previous prime is 254519. The next prime is 254537. The reversal of 254521 is 125452.

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 254521 - 2¹ = 254519 is a prime.

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

It is the 505-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254021) by changing a digit.

It is a nontrivial repunit in base 504.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441 + ... + 838.

It is an arithmetic number, because the mean of its divisors is an integer number (64000).

2²⁵⁴⁵²¹ is an apocalyptic number.

It is an amenable number.

254521 is a deficient number, since it is larger than the sum of its proper divisors (1479).

254521 is a wasteful number, since it uses less digits than its factorization.

254521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478.

The product of its digits is 400, while the sum is 19.

The square root of 254521 is about 504.5007433097. The cubic root of 254521 is about 63.3735263492.

Adding to 254521 its reverse (125452), we get a palindrome (379973).

The spelling of 254521 in words is "two hundred fifty-four thousand, five hundred twenty-one".