126109403 has 16 divisors (see below), whose sum is σ = 153120000. Its totient is φ = 101453472.

The previous prime is 126109381. The next prime is 126109427. The reversal of 126109403 is 304901621.

It is a cyclic number.

It is not a de Polignac number, because 126109403 - 2⁶ = 126109339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126109433) 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, 10148 + ... + 18846.

It is an arithmetic number, because the mean of its divisors is an integer number (9570000).

Almost surely, 2^126109403 is an apocalyptic number.

126109403 is a deficient number, since it is larger than the sum of its proper divisors (27010597).

126109403 is a wasteful number, since it uses less digits than its factorization.

126109403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8834.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 126109403 is about 11229.8442999002. The cubic root of 126109403 is about 501.4748493613.

The spelling of 126109403 in words is "one hundred twenty-six million, one hundred nine thousand, four hundred three".