126809139 has 8 divisors (see below), whose sum is σ = 169781392. Its totient is φ = 84188160.

The previous prime is 126809131. The next prime is 126809153. The reversal of 126809139 is 931908621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126809139 - 2³ = 126809131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126809097 and 126809106.

It is not an unprimeable number, because it can be changed into a prime (126809131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86974 + ... + 88419.

It is an arithmetic number, because the mean of its divisors is an integer number (21222674).

Almost surely, 2^126809139 is an apocalyptic number.

126809139 is a deficient number, since it is larger than the sum of its proper divisors (42972253).

126809139 is a wasteful number, since it uses less digits than its factorization.

126809139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175637.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 126809139 is about 11260.9563981040. The cubic root of 126809139 is about 502.4006407347.

The spelling of 126809139 in words is "one hundred twenty-six million, eight hundred nine thousand, one hundred thirty-nine".