43057 has 4 divisors (see below), whose sum is σ = 49216. Its totient is φ = 36900.

The previous prime is 43051. The next prime is 43063. The reversal of 43057 is 75034.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75034 = 2 ⋅37517.

It is an interprime number because it is at equal distance from previous prime (43051) and next prime (43063).

It is a cyclic number.

It is not a de Polignac number, because 43057 - 2³ = 43049 is a prime.

It is the 208-th Hogben number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (43051) by changing a digit.

It is a nontrivial repunit in base 207.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3069 + ... + 3082.

It is an arithmetic number, because the mean of its divisors is an integer number (12304).

2⁴³⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

43057 is a deficient number, since it is larger than the sum of its proper divisors (6159).

43057 is an equidigital number, since it uses as much as digits as its factorization.

43057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6158.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 43057 is about 207.5018072210. The cubic root of 43057 is about 35.0494538998.

It can be divided in two parts, 4305 and 7, that multiplied together give a triangular number (30135 = T₂₄₅).

The spelling of 43057 in words is "forty-three thousand, fifty-seven".