423120281 has 2 divisors, whose sum is σ = 423120282. Its totient is φ = 423120280.

The previous prime is 423120221. The next prime is 423120283. The reversal of 423120281 is 182021324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 379626256 + 43494025 = 19484^2 + 6595^2 .

It is a cyclic number.

It is not a de Polignac number, because 423120281 - 2¹⁴ = 423103897 is a prime.

It is a super-2 number, since 2×423120281² = 358061544387037922, which contains 22 as substring.

Together with 423120283, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_22501724 and since 423120281 and 22501724 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 (423120283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211560140 + 211560141.

It is an arithmetic number, because the mean of its divisors is an integer number (211560141).

Almost surely, 2^423120281 is an apocalyptic number.

It is an amenable number.

423120281 is a deficient number, since it is larger than the sum of its proper divisors (1).

423120281 is an equidigital number, since it uses as much as digits as its factorization.

423120281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 423120281 is about 20569.8877245356. The cubic root of 423120281 is about 750.7372194023.

The spelling of 423120281 in words is "four hundred twenty-three million, one hundred twenty thousand, two hundred eighty-one".