126118643 has 4 divisors (see below), whose sum is σ = 144135600. Its totient is φ = 108101688.

The previous prime is 126118639. The next prime is 126118679. The reversal of 126118643 is 346811621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346811621 = 13 ⋅26677817.

It is a cyclic number.

It is not a de Polignac number, because 126118643 - 2² = 126118639 is a prime.

It is a super-2 number, since 2×126118643² = 31811824224322898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126118843) 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, 9008468 + ... + 9008481.

It is an arithmetic number, because the mean of its divisors is an integer number (36033900).

Almost surely, 2^126118643 is an apocalyptic number.

126118643 is a deficient number, since it is larger than the sum of its proper divisors (18016957).

126118643 is an equidigital number, since it uses as much as digits as its factorization.

126118643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18016956.

The product of its digits is 6912, while the sum is 32.

The square root of 126118643 is about 11230.2556961095. The cubic root of 126118643 is about 501.4870967019.

The spelling of 126118643 in words is "one hundred twenty-six million, one hundred eighteen thousand, six hundred forty-three".