421434201 has 4 divisors (see below), whose sum is σ = 561912272. Its totient is φ = 280956132.

The previous prime is 421434187. The next prime is 421434229. The reversal of 421434201 is 102434124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 421434201 - 2⁷ = 421434073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421434241) 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, 70239031 + ... + 70239036.

It is an arithmetic number, because the mean of its divisors is an integer number (140478068).

Almost surely, 2^421434201 is an apocalyptic number.

It is an amenable number.

421434201 is a deficient number, since it is larger than the sum of its proper divisors (140478071).

421434201 is a wasteful number, since it uses less digits than its factorization.

421434201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140478070.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 421434201 is about 20528.8626328884. The cubic root of 421434201 is about 749.7386947478.

Adding to 421434201 its reverse (102434124), we get a palindrome (523868325).

The spelling of 421434201 in words is "four hundred twenty-one million, four hundred thirty-four thousand, two hundred one".