421237 has 4 divisors (see below), whose sum is σ = 426060. Its totient is φ = 416416.

The previous prime is 421207. The next prime is 421241. The reversal of 421237 is 732124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77841 + 343396 = 279^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 421237 - 2¹¹ = 419189 is a prime.

It is a super-2 number, since 2×421237² = 354881220338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2278 + ... + 2455.

It is an arithmetic number, because the mean of its divisors is an integer number (106515).

2⁴²¹²³⁷ is an apocalyptic number.

It is an amenable number.

421237 is a deficient number, since it is larger than the sum of its proper divisors (4823).

421237 is an equidigital number, since it uses as much as digits as its factorization.

421237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4822.

The product of its digits is 336, while the sum is 19.

The square root of 421237 is about 649.0277343843. The cubic root of 421237 is about 74.9621735179.

It can be divided in two parts, 4 and 21237, that multiplied together give a palindrome (84948).

The spelling of 421237 in words is "four hundred twenty-one thousand, two hundred thirty-seven".