254021 has 2 divisors, whose sum is σ = 254022. Its totient is φ = 254020.

The previous prime is 254003. The next prime is 254027. The reversal of 254021 is 120452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172225 + 81796 = 415^2 + 286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 253987 and 254005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127010 + 127011.

It is an arithmetic number, because the mean of its divisors is an integer number (127011).

2²⁵⁴⁰²¹ is an apocalyptic number.

It is an amenable number.

254021 is a deficient number, since it is larger than the sum of its proper divisors (1).

254021 is an equidigital number, since it uses as much as digits as its factorization.

254021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 254021 is about 504.0049602931. The cubic root of 254021 is about 63.3320005875.

Adding to 254021 its reverse (120452), we get a palindrome (374473).

The spelling of 254021 in words is "two hundred fifty-four thousand, twenty-one".