421026167 has 2 divisors, whose sum is σ = 421026168. Its totient is φ = 421026166.

The previous prime is 421026161. The next prime is 421026169. The reversal of 421026167 is 761620124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421026167 is a prime.

Together with 421026169, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421026161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210513083 + 210513084.

It is an arithmetic number, because the mean of its divisors is an integer number (210513084).

Almost surely, 2^421026167 is an apocalyptic number.

421026167 is a deficient number, since it is larger than the sum of its proper divisors (1).

421026167 is an equidigital number, since it uses as much as digits as its factorization.

421026167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 421026167 is about 20518.9221695488. The cubic root of 421026167 is about 749.4966501126.

The spelling of 421026167 in words is "four hundred twenty-one million, twenty-six thousand, one hundred sixty-seven".