254421 has 14 divisors (see below), whose sum is σ = 382550. Its totient is φ = 169128.

The previous prime is 254413. The next prime is 254437. The reversal of 254421 is 124452.

It can be written as a sum of positive squares in only one way, i.e., 236196 + 18225 = 486^2 + 135^2 .

It is not a de Polignac number, because 254421 - 2³ = 254413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 254394 and 254403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 555 + ... + 903.

It is an arithmetic number, because the mean of its divisors is an integer number (27325).

2²⁵⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

254421 is a deficient number, since it is larger than the sum of its proper divisors (128129).

254421 is an frugal number, since it uses more digits than its factorization.

254421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 352 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 254421 is about 504.4016256913. The cubic root of 254421 is about 63.3652255504.

Adding to 254421 its reverse (124452), we get a palindrome (378873).

The spelling of 254421 in words is "two hundred fifty-four thousand, four hundred twenty-one".