421530441 has 4 divisors (see below), whose sum is σ = 562040592. Its totient is φ = 281020292.

The previous prime is 421530413. The next prime is 421530463. The reversal of 421530441 is 144035124.

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 a cyclic number.

It is not a de Polignac number, because 421530441 - 2⁶ = 421530377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421530401) 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, 70255071 + ... + 70255076.

It is an arithmetic number, because the mean of its divisors is an integer number (140510148).

Almost surely, 2^421530441 is an apocalyptic number.

It is an amenable number.

421530441 is a deficient number, since it is larger than the sum of its proper divisors (140510151).

421530441 is a wasteful number, since it uses less digits than its factorization.

421530441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140510150.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 421530441 is about 20531.2065159357. The cubic root of 421530441 is about 749.7957612760.

Adding to 421530441 its reverse (144035124), we get a palindrome (565565565).

The spelling of 421530441 in words is "four hundred twenty-one million, five hundred thirty thousand, four hundred forty-one".