421102404 has 18 divisors (see below), whose sum is σ = 1064453390. Its totient is φ = 140367456.

The previous prime is 421102403. The next prime is 421102421. The reversal of 421102404 is 404201124.

421102404 is a `hidden beast` number, since 421 + 1 + 0 + 240 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 299220804 + 121881600 = 17298^2 + 11040^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (421102403) 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 5 ways as a sum of consecutive naturals, for example, 5848609 + ... + 5848680.

Almost surely, 2^421102404 is an apocalyptic number.

It is an amenable number.

421102404 is an abundant number, since it is smaller than the sum of its proper divisors (643350986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421102404 is a wasteful number, since it uses less digits than its factorization.

421102404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11697299 (or 11697294 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 421102404 is about 20520.7798097441. The cubic root of 421102404 is about 749.5418855652.

Adding to 421102404 its reverse (404201124), we get a palindrome (825303528).

The spelling of 421102404 in words is "four hundred twenty-one million, one hundred two thousand, four hundred four".