421253267 has 2 divisors, whose sum is σ = 421253268. Its totient is φ = 421253266.

The previous prime is 421253221. The next prime is 421253297. The reversal of 421253267 is 762352124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421253267 - 2¹⁰ = 421252243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421253297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210626633 + 210626634.

It is an arithmetic number, because the mean of its divisors is an integer number (210626634).

Almost surely, 2^421253267 is an apocalyptic number.

421253267 is a deficient number, since it is larger than the sum of its proper divisors (1).

421253267 is an equidigital number, since it uses as much as digits as its factorization.

421253267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 32.

The square root of 421253267 is about 20524.4553399110. The cubic root of 421253267 is about 749.6313844895.

The spelling of 421253267 in words is "four hundred twenty-one million, two hundred fifty-three thousand, two hundred sixty-seven".