421442201 has 8 divisors (see below), whose sum is σ = 426154344. Its totient is φ = 416747520.

The previous prime is 421442149. The next prime is 421442227. The reversal of 421442201 is 102244124.

It can be written as a sum of positive squares in 4 ways, for example, as 17472400 + 403969801 = 4180^2 + 20099^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421442201 - 2⁶ = 421442137 is a prime.

It is a super-2 number, since 2×421442201² = 355227057567448802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421442701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47561 + ... + 55721.

It is an arithmetic number, because the mean of its divisors is an integer number (53269293).

Almost surely, 2^421442201 is an apocalyptic number.

It is an amenable number.

421442201 is a deficient number, since it is larger than the sum of its proper divisors (4712143).

421442201 is a wasteful number, since it uses less digits than its factorization.

421442201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 421442201 is about 20529.0574795824. The cubic root of 421442201 is about 749.7434387636.

Adding to 421442201 its reverse (102244124), we get a palindrome (523686325).

The spelling of 421442201 in words is "four hundred twenty-one million, four hundred forty-two thousand, two hundred one".