431321 has 8 divisors (see below), whose sum is σ = 476064. Its totient is φ = 387520.

The previous prime is 431311. The next prime is 431329. The reversal of 431321 is 123134.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 431321 - 2⁶ = 431257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431296 and 431305.

It is not an unprimeable number, because it can be changed into a prime (431329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070 + ... + 1416.

It is an arithmetic number, because the mean of its divisors is an integer number (59508).

2⁴³¹³²¹ is an apocalyptic number.

It is an amenable number.

431321 is a deficient number, since it is larger than the sum of its proper divisors (44743).

431321 is a wasteful number, since it uses less digits than its factorization.

431321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471.

The product of its digits is 72, while the sum is 14.

The square root of 431321 is about 656.7503330795. The cubic root of 431321 is about 75.5556363737. Note that the first 3 decimals are identical.

Adding to 431321 its reverse (123134), we get a palindrome (554455).

It can be divided in two parts, 4313 and 21, that added together give a palindrome (4334).

The spelling of 431321 in words is "four hundred thirty-one thousand, three hundred twenty-one".