421133441 has 2 divisors, whose sum is σ = 421133442. Its totient is φ = 421133440.

The previous prime is 421133431. The next prime is 421133491. The reversal of 421133441 is 144331124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232867600 + 188265841 = 15260^2 + 13721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421133441 is a prime.

It is not a weakly prime, because it can be changed into another prime (421133411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210566720 + 210566721.

It is an arithmetic number, because the mean of its divisors is an integer number (210566721).

Almost surely, 2^421133441 is an apocalyptic number.

It is an amenable number.

421133441 is a deficient number, since it is larger than the sum of its proper divisors (1).

421133441 is an equidigital number, since it uses as much as digits as its factorization.

421133441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 421133441 is about 20521.5360292547. The cubic root of 421133441 is about 749.5602998984.

Adding to 421133441 its reverse (144331124), we get a palindrome (565464565).

It can be divided in two parts, 42113 and 3441, that added together give a palindrome (45554).

The spelling of 421133441 in words is "four hundred twenty-one million, one hundred thirty-three thousand, four hundred forty-one".