431465 has 4 divisors (see below), whose sum is σ = 517764. Its totient is φ = 345168.

The previous prime is 431449. The next prime is 431479. The reversal of 431465 is 564134.

It is a happy number.

431465 is nontrivially palindromic in base 4.

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 55696 + 375769 = 236^2 + 613^2 .

It is a cyclic number.

It is not a de Polignac number, because 431465 - 2⁴ = 431449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 431465.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 431465.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43142 + ... + 43151.

It is an arithmetic number, because the mean of its divisors is an integer number (129441).

2⁴³¹⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

431465 is a deficient number, since it is larger than the sum of its proper divisors (86299).

431465 is an equidigital number, since it uses as much as digits as its factorization.

431465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86298.

The product of its digits is 1440, while the sum is 23.

The square root of 431465 is about 656.8599546326. The cubic root of 431465 is about 75.5640437247.

Adding to 431465 its reverse (564134), we get a palindrome (995599).

The spelling of 431465 in words is "four hundred thirty-one thousand, four hundred sixty-five".