43401 has 16 divisors (see below), whose sum is σ = 65664. Its totient is φ = 25344.

The previous prime is 43399. The next prime is 43403. The reversal of 43401 is 10434.

43401 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (43399) and next prime (43403).

It is not a de Polignac number, because 43401 - 2¹ = 43399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43403) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1155 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (4104).

2⁴³⁴⁰¹ is an apocalyptic number.

It is an amenable number.

43401 is a deficient number, since it is larger than the sum of its proper divisors (22263).

43401 is a wasteful number, since it uses less digits than its factorization.

43401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 43401 is about 208.3290666230. The cubic root of 43401 is about 35.1425478949.

Adding to 43401 its reverse (10434), we get a palindrome (53835).

It can be divided in two parts, 43 and 401, that added together give a palindrome (444).

The spelling of 43401 in words is "forty-three thousand, four hundred one", and thus it is an iban number.