421404212 has 6 divisors (see below), whose sum is σ = 737457378. Its totient is φ = 210702104.

The previous prime is 421404167. The next prime is 421404223. The reversal of 421404212 is 212404124.

It can be written as a sum of positive squares in only one way, i.e., 302899216 + 118504996 = 17404^2 + 10886^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52675523 + ... + 52675530.

It is an arithmetic number, because the mean of its divisors is an integer number (122909563).

Almost surely, 2^421404212 is an apocalyptic number.

It is an amenable number.

421404212 is a deficient number, since it is larger than the sum of its proper divisors (316053166).

421404212 is a wasteful number, since it uses less digits than its factorization.

421404212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105351057 (or 105351055 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 421404212 is about 20528.1322092391. The cubic root of 421404212 is about 749.7209106769.

Adding to 421404212 its reverse (212404124), we get a palindrome (633808336).

The spelling of 421404212 in words is "four hundred twenty-one million, four hundred four thousand, two hundred twelve".