126547643 has 4 divisors (see below), whose sum is σ = 133991640. Its totient is φ = 119103648.

The previous prime is 126547639. The next prime is 126547697. The reversal of 126547643 is 346745621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 126547643 - 2² = 126547639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126547597 and 126547606.

It is not an unprimeable number, because it can be changed into a prime (126547613) 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, 3721973 + ... + 3722006.

It is an arithmetic number, because the mean of its divisors is an integer number (33497910).

Almost surely, 2^126547643 is an apocalyptic number.

126547643 is a deficient number, since it is larger than the sum of its proper divisors (7443997).

126547643 is an equidigital number, since it uses as much as digits as its factorization.

126547643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7443996.

The product of its digits is 120960, while the sum is 38.

The square root of 126547643 is about 11249.3396695095. The cubic root of 126547643 is about 502.0550658366.

The spelling of 126547643 in words is "one hundred twenty-six million, five hundred forty-seven thousand, six hundred forty-three".