421840275 has 24 divisors (see below), whose sum is σ = 712287744. Its totient is φ = 220192800.

The previous prime is 421840271. The next prime is 421840283. The reversal of 421840275 is 572048124.

It is not a de Polignac number, because 421840275 - 2² = 421840271 is a prime.

It is a super-2 number, since 2×421840275² = 355898435224151250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421840271) 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, 56311 + ... + 63360.

It is an arithmetic number, because the mean of its divisors is an integer number (29678656).

Almost surely, 2^421840275 is an apocalyptic number.

421840275 is a deficient number, since it is larger than the sum of its proper divisors (290447469).

421840275 is a wasteful number, since it uses less digits than its factorization.

421840275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119731 (or 119726 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 421840275 is about 20538.7505705678. The cubic root of 421840275 is about 749.9794216576.

Adding to 421840275 its reverse (572048124), we get a palindrome (993888399).

The spelling of 421840275 in words is "four hundred twenty-one million, eight hundred forty thousand, two hundred seventy-five".