421255273 has 2 divisors, whose sum is σ = 421255274. Its totient is φ = 421255272.

The previous prime is 421255231. The next prime is 421255319. The reversal of 421255273 is 372552124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315843984 + 105411289 = 17772^2 + 10267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421255273 is a prime.

It is not a weakly prime, because it can be changed into another prime (421255673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210627636 + 210627637.

It is an arithmetic number, because the mean of its divisors is an integer number (210627637).

Almost surely, 2^421255273 is an apocalyptic number.

It is an amenable number.

421255273 is a deficient number, since it is larger than the sum of its proper divisors (1).

421255273 is an equidigital number, since it uses as much as digits as its factorization.

421255273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 421255273 is about 20524.5042083847. The cubic root of 421255273 is about 749.6325743977.

The spelling of 421255273 in words is "four hundred twenty-one million, two hundred fifty-five thousand, two hundred seventy-three".