43126123 has 2 divisors, whose sum is σ = 43126124. Its totient is φ = 43126122.

The previous prime is 43126121. The next prime is 43126129. The reversal of 43126123 is 32162134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43126123 - 2¹ = 43126121 is a prime.

It is a super-2 number, since 2×43126123² = 3719724970022258, which contains 22 as substring.

Together with 43126121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 43126094 and 43126103.

It is not a weakly prime, because it can be changed into another prime (43126121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21563061 + 21563062.

It is an arithmetic number, because the mean of its divisors is an integer number (21563062).

Almost surely, 2^43126123 is an apocalyptic number.

43126123 is a deficient number, since it is larger than the sum of its proper divisors (1).

43126123 is an equidigital number, since it uses as much as digits as its factorization.

43126123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 43126123 is about 6567.0482714839. The cubic root of 43126123 is about 350.6819981096.

Adding to 43126123 its reverse (32162134), we get a palindrome (75288257).

The spelling of 43126123 in words is "forty-three million, one hundred twenty-six thousand, one hundred twenty-three".