43457 has 2 divisors, whose sum is σ = 43458. Its totient is φ = 43456.

The previous prime is 43451. The next prime is 43481. The reversal of 43457 is 75434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38416 + 5041 = 196^2 + 71^2 .

It is a cyclic number.

It is not a de Polignac number, because 43457 - 2⁴ = 43441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43451) 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 as a sum of consecutive naturals, namely, 21728 + 21729.

It is an arithmetic number, because the mean of its divisors is an integer number (21729).

2⁴³⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

43457 is a deficient number, since it is larger than the sum of its proper divisors (1).

43457 is an equidigital number, since it uses as much as digits as its factorization.

43457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 23.

The square root of 43457 is about 208.4634260488. The cubic root of 43457 is about 35.1576561248.

Subtracting from 43457 its sum of digits (23), we obtain a palindrome (43434).

The spelling of 43457 in words is "forty-three thousand, four hundred fifty-seven".