254107921 has 2 divisors, whose sum is σ = 254107922. Its totient is φ = 254107920.

The previous prime is 254107879. The next prime is 254107927. The reversal of 254107921 is 129701452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235960321 + 18147600 = 15361^2 + 4260^2 .

It is a cyclic number.

It is not a de Polignac number, because 254107921 - 2²¹ = 252010769 is a prime.

It is not a weakly prime, because it can be changed into another prime (254107927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127053960 + 127053961.

It is an arithmetic number, because the mean of its divisors is an integer number (127053961).

Almost surely, 2^254107921 is an apocalyptic number.

It is an amenable number.

254107921 is a deficient number, since it is larger than the sum of its proper divisors (1).

254107921 is an equidigital number, since it uses as much as digits as its factorization.

254107921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 254107921 is about 15940.7628738401. The cubic root of 254107921 is about 633.3922341957.

The spelling of 254107921 in words is "two hundred fifty-four million, one hundred seven thousand, nine hundred twenty-one".