40465 has 4 divisors (see below), whose sum is σ = 48564. Its totient is φ = 32368.

The previous prime is 40459. The next prime is 40471. The reversal of 40465 is 56404.

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

It is an interprime number because it is at equal distance from previous prime (40459) and next prime (40471).

It can be written as a sum of positive squares in 2 ways, for example, as 16129 + 24336 = 127^2 + 156^2 .

It is a cyclic number.

It is not a de Polignac number, because 40465 - 2⁵ = 40433 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4042 + ... + 4051.

It is an arithmetic number, because the mean of its divisors is an integer number (12141).

2⁴⁰⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

40465 is a deficient number, since it is larger than the sum of its proper divisors (8099).

40465 is an equidigital number, since it uses as much as digits as its factorization.

40465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8098.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40465 is about 201.1591409805. The cubic root of 40465 is about 34.3315318333.

Adding to 40465 its reverse (56404), we get a palindrome (96869).

It can be divided in two parts, 40 and 465, that added together give a palindrome (505).

The spelling of 40465 in words is "forty thousand, four hundred sixty-five".