421210 has 16 divisors (see below), whose sum is σ = 769896. Its totient is φ = 165888.

The previous prime is 421207. The next prime is 421241. The reversal of 421210 is 12124.

421210 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 4 ways, for example, as 418609 + 2601 = 647^2 + 51^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 442 + ... + 1018.

2⁴²¹²¹⁰ is an apocalyptic number.

421210 is a deficient number, since it is larger than the sum of its proper divisors (348686).

421210 is a wasteful number, since it uses less digits than its factorization.

421210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 421210 is about 649.0069337072. The cubic root of 421210 is about 74.9605718685.

Adding to 421210 its reverse (12124), we get a palindrome (433334).

It can be divided in two parts, 421 and 210, that multiplied together give a triangular number (88410 = T₄₂₀).

The spelling of 421210 in words is "four hundred twenty-one thousand, two hundred ten", and thus it is an iban number.