421864071 has 4 divisors (see below), whose sum is σ = 562485432. Its totient is φ = 281242712.

The previous prime is 421864063. The next prime is 421864097. The reversal of 421864071 is 170468124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421864071 - 2³ = 421864063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421864171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70310676 + ... + 70310681.

It is an arithmetic number, because the mean of its divisors is an integer number (140621358).

Almost surely, 2^421864071 is an apocalyptic number.

421864071 is a deficient number, since it is larger than the sum of its proper divisors (140621361).

421864071 is a wasteful number, since it uses less digits than its factorization.

421864071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140621360.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 421864071 is about 20539.3298576171. The cubic root of 421864071 is about 749.9935234996.

The spelling of 421864071 in words is "four hundred twenty-one million, eight hundred sixty-four thousand, seventy-one".