431421 has 4 divisors (see below), whose sum is σ = 575232. Its totient is φ = 287612.

The previous prime is 431399. The next prime is 431423. The reversal of 431421 is 124134.

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 431421 - 2⁹ = 430909 is a prime.

It is a super-2 number, since 2×431421² = 372248158482, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 431421.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 431421.

It is not an unprimeable number, because it can be changed into a prime (431423) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 71901 + ... + 71906.

It is an arithmetic number, because the mean of its divisors is an integer number (143808).

2⁴³¹⁴²¹ is an apocalyptic number.

It is an amenable number.

431421 is a deficient number, since it is larger than the sum of its proper divisors (143811).

431421 is a wasteful number, since it uses less digits than its factorization.

431421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143810.

The product of its digits is 96, while the sum is 15.

The square root of 431421 is about 656.8264610991. The cubic root of 431421 is about 75.5614750104.

Adding to 431421 its reverse (124134), we get a palindrome (555555).

The spelling of 431421 in words is "four hundred thirty-one thousand, four hundred twenty-one".