126638743 has 16 divisors (see below), whose sum is σ = 166199040. Its totient is φ = 93484800.

The previous prime is 126638731. The next prime is 126638747. The reversal of 126638743 is 347836621.

It is a cyclic number.

It is not a de Polignac number, because 126638743 - 2⁵ = 126638711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126638696 and 126638705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126638747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41818 + ... + 44743.

It is an arithmetic number, because the mean of its divisors is an integer number (10387440).

Almost surely, 2^126638743 is an apocalyptic number.

126638743 is a deficient number, since it is larger than the sum of its proper divisors (39560297).

126638743 is a wasteful number, since it uses less digits than its factorization.

126638743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86598.

The product of its digits is 145152, while the sum is 40.

The square root of 126638743 is about 11253.3880675999. The cubic root of 126638743 is about 502.1755112399.

The spelling of 126638743 in words is "one hundred twenty-six million, six hundred thirty-eight thousand, seven hundred forty-three".