421201441 has 4 divisors (see below), whose sum is σ = 429148692. Its totient is φ = 413254192.

The previous prime is 421201421. The next prime is 421201471. The reversal of 421201441 is 144102124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 298080225 + 123121216 = 17265^2 + 11096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421201441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421201421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3973546 + ... + 3973651.

It is an arithmetic number, because the mean of its divisors is an integer number (107287173).

Almost surely, 2^421201441 is an apocalyptic number.

It is an amenable number.

421201441 is a deficient number, since it is larger than the sum of its proper divisors (7947251).

421201441 is an equidigital number, since it uses as much as digits as its factorization.

421201441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7947250.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 421201441 is about 20523.1927584380. The cubic root of 421201441 is about 749.6006413139.

Adding to 421201441 its reverse (144102124), we get a palindrome (565303565).

It can be divided in two parts, 421201 and 441, that multiplied together give a square (185749641 = 13629²).

The spelling of 421201441 in words is "four hundred twenty-one million, two hundred one thousand, four hundred forty-one".