126109429 has 4 divisors (see below), whose sum is σ = 130458060. Its totient is φ = 121760800.

The previous prime is 126109427. The next prime is 126109433. The reversal of 126109429 is 924901621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 102050404 + 24059025 = 10102^2 + 4905^2 .

It is a cyclic number.

It is not a de Polignac number, because 126109429 - 2¹ = 126109427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126109394 and 126109403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126109427) 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, 2174272 + ... + 2174329.

It is an arithmetic number, because the mean of its divisors is an integer number (32614515).

Almost surely, 2^126109429 is an apocalyptic number.

It is an amenable number.

126109429 is a deficient number, since it is larger than the sum of its proper divisors (4348631).

126109429 is an equidigital number, since it uses as much as digits as its factorization.

126109429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348630.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 126109429 is about 11229.8454575297. The cubic root of 126109429 is about 501.4748838244.

The spelling of 126109429 in words is "one hundred twenty-six million, one hundred nine thousand, four hundred twenty-nine".