43006861 has 4 divisors (see below), whose sum is σ = 45270400. Its totient is φ = 40743324.

The previous prime is 43006829. The next prime is 43006871. The reversal of 43006861 is 16860034.

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.

It is a cyclic number.

It is not a de Polignac number, because 43006861 - 2⁵ = 43006829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43006801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1131741 + ... + 1131778.

It is an arithmetic number, because the mean of its divisors is an integer number (11317600).

Almost surely, 2^43006861 is an apocalyptic number.

It is an amenable number.

43006861 is a deficient number, since it is larger than the sum of its proper divisors (2263539).

43006861 is a wasteful number, since it uses less digits than its factorization.

43006861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263538.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 43006861 is about 6557.9616497811. The cubic root of 43006861 is about 350.3584382370.

Adding to 43006861 its reverse (16860034), we get a palindrome (59866895).

The spelling of 43006861 in words is "forty-three million, six thousand, eight hundred sixty-one".