421206371 has 4 divisors (see below), whose sum is σ = 431001912. Its totient is φ = 411410832.

The previous prime is 421206361. The next prime is 421206397. The reversal of 421206371 is 173602124.

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 421206371 - 2¹⁰ = 421205347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421206371.

It is not an unprimeable number, because it can be changed into a prime (421206361) 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, 4897706 + ... + 4897791.

It is an arithmetic number, because the mean of its divisors is an integer number (107750478).

Almost surely, 2^421206371 is an apocalyptic number.

421206371 is a deficient number, since it is larger than the sum of its proper divisors (9795541).

421206371 is an equidigital number, since it uses as much as digits as its factorization.

421206371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9795540.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 421206371 is about 20523.3128661042. The cubic root of 421206371 is about 749.6035658977.

Adding to 421206371 its reverse (173602124), we get a palindrome (594808495).

The spelling of 421206371 in words is "four hundred twenty-one million, two hundred six thousand, three hundred seventy-one".