421235604 has 18 divisors (see below), whose sum is σ = 1064790090. Its totient is φ = 140411856.

The previous prime is 421235603. The next prime is 421235693. The reversal of 421235604 is 406532124.

421235604 is a `hidden beast` number, since 4 + 21 + 2 + 35 + 604 = 666.

It can be written as a sum of positive squares in only one way, i.e., 380250000 + 40985604 = 19500^2 + 6402^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421235603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5850459 + ... + 5850530.

It is an arithmetic number, because the mean of its divisors is an integer number (59155005).

Almost surely, 2^421235604 is an apocalyptic number.

It is an amenable number.

421235604 is an abundant number, since it is smaller than the sum of its proper divisors (643554486).

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

421235604 is a wasteful number, since it uses less digits than its factorization.

421235604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11700999 (or 11700994 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 421235604 is about 20524.0250438358. The cubic root of 421235604 is about 749.6209070837.

Adding to 421235604 its reverse (406532124), we get a palindrome (827767728).

The spelling of 421235604 in words is "four hundred twenty-one million, two hundred thirty-five thousand, six hundred four".