421154647 has 2 divisors, whose sum is σ = 421154648. Its totient is φ = 421154646.

The previous prime is 421154621. The next prime is 421154681. The reversal of 421154647 is 746451124.

It is an a-pointer prime, because the next prime (421154681) can be obtained adding 421154647 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421154647 - 2⁷ = 421154519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421154687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210577323 + 210577324.

It is an arithmetic number, because the mean of its divisors is an integer number (210577324).

Almost surely, 2^421154647 is an apocalyptic number.

421154647 is a deficient number, since it is larger than the sum of its proper divisors (1).

421154647 is an equidigital number, since it uses as much as digits as its factorization.

421154647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 34.

The square root of 421154647 is about 20522.0526994743. The cubic root of 421154647 is about 749.5728809534.

The spelling of 421154647 in words is "four hundred twenty-one million, one hundred fifty-four thousand, six hundred forty-seven".