254438021 has 2 divisors, whose sum is σ = 254438022. Its totient is φ = 254438020.

The previous prime is 254438003. The next prime is 254438053. The reversal of 254438021 is 120834452.

It is a happy number.

254438021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140161921 + 114276100 = 11839^2 + 10690^2 .

It is a cyclic number.

It is not a de Polignac number, because 254438021 - 2⁶ = 254437957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254438071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127219010 + 127219011.

It is an arithmetic number, because the mean of its divisors is an integer number (127219011).

Almost surely, 2^254438021 is an apocalyptic number.

It is an amenable number.

254438021 is a deficient number, since it is larger than the sum of its proper divisors (1).

254438021 is an equidigital number, since it uses as much as digits as its factorization.

254438021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 254438021 is about 15951.1134721060. The cubic root of 254438021 is about 633.6663858296. Note that the first 3 decimals are identical.

The spelling of 254438021 in words is "two hundred fifty-four million, four hundred thirty-eight thousand, twenty-one".