254313721 has 2 divisors, whose sum is σ = 254313722. Its totient is φ = 254313720.

The previous prime is 254313701. The next prime is 254313749. The reversal of 254313721 is 127313452.

254313721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (254313749) can be obtained adding 254313721 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242238096 + 12075625 = 15564^2 + 3475^2 .

It is a cyclic number.

It is not a de Polignac number, because 254313721 - 2¹³ = 254305529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 254313721.

It is not a weakly prime, because it can be changed into another prime (254313701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127156860 + 127156861.

It is an arithmetic number, because the mean of its divisors is an integer number (127156861).

Almost surely, 2^254313721 is an apocalyptic number.

It is an amenable number.

254313721 is a deficient number, since it is larger than the sum of its proper divisors (1).

254313721 is an equidigital number, since it uses as much as digits as its factorization.

254313721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 254313721 is about 15947.2167164054. The cubic root of 254313721 is about 633.5631811786.

The spelling of 254313721 in words is "two hundred fifty-four million, three hundred thirteen thousand, seven hundred twenty-one".