254371721 has 2 divisors, whose sum is σ = 254371722. Its totient is φ = 254371720.

The previous prime is 254371717. The next prime is 254371727. The reversal of 254371721 is 127173452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164121721 + 90250000 = 12811^2 + 9500^2 .

It is a cyclic number.

It is not a de Polignac number, because 254371721 - 2² = 254371717 is a prime.

It is a Chen prime.

It is equal to p_13905284 and since 254371721 and 13905284 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (254371727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127185860 + 127185861.

It is an arithmetic number, because the mean of its divisors is an integer number (127185861).

Almost surely, 2^254371721 is an apocalyptic number.

It is an amenable number.

254371721 is a deficient number, since it is larger than the sum of its proper divisors (1).

254371721 is an equidigital number, since it uses as much as digits as its factorization.

254371721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 32.

The square root of 254371721 is about 15949.0351118806. The cubic root of 254371721 is about 633.6113419976.

The spelling of 254371721 in words is "two hundred fifty-four million, three hundred seventy-one thousand, seven hundred twenty-one".