421431847 has 16 divisors (see below), whose sum is σ = 435105792. Its totient is φ = 408058560.

The previous prime is 421431833. The next prime is 421431851. The reversal of 421431847 is 748134124.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 421431847 - 2⁷ = 421431719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421431817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1214328 + ... + 1214674.

It is an arithmetic number, because the mean of its divisors is an integer number (27194112).

Almost surely, 2^421431847 is an apocalyptic number.

421431847 is a deficient number, since it is larger than the sum of its proper divisors (13673945).

421431847 is a wasteful number, since it uses less digits than its factorization.

421431847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678.

The product of its digits is 21504, while the sum is 34.

The square root of 421431847 is about 20528.8052988965. The cubic root of 421431847 is about 749.7372988097.

The spelling of 421431847 in words is "four hundred twenty-one million, four hundred thirty-one thousand, eight hundred forty-seven".