126741643 has 4 divisors (see below), whose sum is σ = 144847600. Its totient is φ = 108635688.

The previous prime is 126741611. The next prime is 126741649. The reversal of 126741643 is 346147621.

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

It is not a de Polignac number, because 126741643 - 2⁵ = 126741611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126741599 and 126741608.

It is not an unprimeable number, because it can be changed into a prime (126741649) 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, 9052968 + ... + 9052981.

It is an arithmetic number, because the mean of its divisors is an integer number (36211900).

Almost surely, 2^126741643 is an apocalyptic number.

126741643 is a deficient number, since it is larger than the sum of its proper divisors (18105957).

126741643 is an equidigital number, since it uses as much as digits as its factorization.

126741643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18105956.

The product of its digits is 24192, while the sum is 34.

The square root of 126741643 is about 11257.9590956798. The cubic root of 126741643 is about 502.3114882439.

The spelling of 126741643 in words is "one hundred twenty-six million, seven hundred forty-one thousand, six hundred forty-three".