4231421 has 4 divisors (see below), whose sum is σ = 4303200. Its totient is φ = 4159644.

The previous prime is 4231417. The next prime is 4231427. The reversal of 4231421 is 1241324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4231421 - 2² = 4231417 is a prime.

It is a d-powerful number, because it can be written as 4⁶ + 2³ + 3⁵ + 1 + 4¹¹ + 2¹⁵ + 1 .

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4231421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4231427) 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, 35801 + ... + 35918.

It is an arithmetic number, because the mean of its divisors is an integer number (1075800).

Almost surely, 2^4231421 is an apocalyptic number.

It is an amenable number.

4231421 is a deficient number, since it is larger than the sum of its proper divisors (71779).

4231421 is an equidigital number, since it uses as much as digits as its factorization.

4231421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71778.

The product of its digits is 192, while the sum is 17.

The square root of 4231421 is about 2057.0418080341. The cubic root of 4231421 is about 161.7442109780.

Adding to 4231421 its reverse (1241324), we get a palindrome (5472745).

The spelling of 4231421 in words is "four million, two hundred thirty-one thousand, four hundred twenty-one".