126542443 has 4 divisors (see below), whose sum is σ = 126647640. Its totient is φ = 126437248.

The previous prime is 126542387. The next prime is 126542461. The reversal of 126542443 is 344245621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126542443 is a prime.

It is a super-4 number, since 4×126542443⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126542473) 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, 50773 + ... + 53206.

It is an arithmetic number, because the mean of its divisors is an integer number (31661910).

Almost surely, 2^126542443 is an apocalyptic number.

126542443 is a deficient number, since it is larger than the sum of its proper divisors (105197).

126542443 is a wasteful number, since it uses less digits than its factorization.

126542443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105196.

The product of its digits is 23040, while the sum is 31.

The square root of 126542443 is about 11249.1085424579. The cubic root of 126542443 is about 502.0481890535.

The spelling of 126542443 in words is "one hundred twenty-six million, five hundred forty-two thousand, four hundred forty-three".