421144147 has 2 divisors, whose sum is σ = 421144148. Its totient is φ = 421144146.

The previous prime is 421144123. The next prime is 421144153. The reversal of 421144147 is 741441124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421144147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421144117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210572073 + 210572074.

It is an arithmetic number, because the mean of its divisors is an integer number (210572074).

Almost surely, 2^421144147 is an apocalyptic number.

421144147 is a deficient number, since it is larger than the sum of its proper divisors (1).

421144147 is an equidigital number, since it uses as much as digits as its factorization.

421144147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 28.

The square root of 421144147 is about 20521.7968755175. The cubic root of 421144147 is about 749.5666515864.

The spelling of 421144147 in words is "four hundred twenty-one million, one hundred forty-four thousand, one hundred forty-seven".