421303075 has 24 divisors (see below), whose sum is σ = 552652128. Its totient is φ = 317940480.

The previous prime is 421303049. The next prime is 421303079. The reversal of 421303075 is 570303124.

It is not a de Polignac number, because 421303075 - 2¹⁵ = 421270307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421303079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36957 + ... + 46993.

It is an arithmetic number, because the mean of its divisors is an integer number (23027172).

Almost surely, 2^421303075 is an apocalyptic number.

421303075 is a deficient number, since it is larger than the sum of its proper divisors (131349053).

421303075 is a wasteful number, since it uses less digits than its factorization.

421303075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10143 (or 10138 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 421303075 is about 20525.6686858187. The cubic root of 421303075 is about 749.6609282117.

Adding to 421303075 its reverse (570303124), we get a palindrome (991606199).

The spelling of 421303075 in words is "four hundred twenty-one million, three hundred three thousand, seventy-five".