126138138 has 24 divisors (see below), whose sum is σ = 288482208. Its totient is φ = 36018672.

The previous prime is 126138109. The next prime is 126138149. The reversal of 126138138 is 831831621.

It is a junction number, because it is equal to n+sod(n) for n = 126138099 and 126138108.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71920 + ... + 73652.

It is an arithmetic number, because the mean of its divisors is an integer number (12020092).

Almost surely, 2^126138138 is an apocalyptic number.

126138138 is an abundant number, since it is smaller than the sum of its proper divisors (162344070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126138138 is an frugal number, since it uses more digits than its factorization.

126138138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478 (or 1745 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 126138138 is about 11231.1236303408. The cubic root of 126138138 is about 501.5129347727.

Adding to 126138138 its reverse (831831621), we get a palindrome (957969759).

The spelling of 126138138 in words is "one hundred twenty-six million, one hundred thirty-eight thousand, one hundred thirty-eight".