421236 has 18 divisors (see below), whose sum is σ = 1064882. Its totient is φ = 140400.

The previous prime is 421207. The next prime is 421241. The reversal of 421236 is 632124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 24336 = 630^2 + 156^2 .

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 a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

421236 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 5 ways as a sum of consecutive naturals, for example, 5815 + ... + 5886.

2⁴²¹²³⁶ is an apocalyptic number.

It is an amenable number.

421236 is an abundant number, since it is smaller than the sum of its proper divisors (643646).

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

421236 is a wasteful number, since it uses less digits than its factorization.

421236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11711 (or 11706 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 421236 is about 649.0269640007. The cubic root of 421236 is about 74.9621141988.

The spelling of 421236 in words is "four hundred twenty-one thousand, two hundred thirty-six".