254170421 has 2 divisors, whose sum is σ = 254170422. Its totient is φ = 254170420.

The previous prime is 254170403. The next prime is 254170453. The reversal of 254170421 is 124071452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250114225 + 4056196 = 15815^2 + 2014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254170421 is a prime.

It is a super-2 number, since 2×254170421² = 129205205822634482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254170481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127085210 + 127085211.

It is an arithmetic number, because the mean of its divisors is an integer number (127085211).

Almost surely, 2^254170421 is an apocalyptic number.

It is an amenable number.

254170421 is a deficient number, since it is larger than the sum of its proper divisors (1).

254170421 is an equidigital number, since it uses as much as digits as its factorization.

254170421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 254170421 is about 15942.7231362776. The cubic root of 254170421 is about 633.4441593375. Note that the first 3 decimals are identical.

The spelling of 254170421 in words is "two hundred fifty-four million, one hundred seventy thousand, four hundred twenty-one".