421045647 has 32 divisors (see below), whose sum is σ = 651711744. Its totient is φ = 238963200.

The previous prime is 421045633. The next prime is 421045661. The reversal of 421045647 is 746540124.

It is an interprime number because it is at equal distance from previous prime (421045633) and next prime (421045661).

It is not a de Polignac number, because 421045647 - 2¹⁴ = 421029263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421045697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116593 + ... + 120149.

It is an arithmetic number, because the mean of its divisors is an integer number (20365992).

Almost surely, 2^421045647 is an apocalyptic number.

421045647 is a deficient number, since it is larger than the sum of its proper divisors (230666097).

421045647 is a wasteful number, since it uses less digits than its factorization.

421045647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 421045647 is about 20519.3968478608. The cubic root of 421045647 is about 749.5082091484.

The spelling of 421045647 in words is "four hundred twenty-one million, forty-five thousand, six hundred forty-seven".