126216138 has 8 divisors (see below), whose sum is σ = 252432288. Its totient is φ = 42072044.

The previous prime is 126216131. The next prime is 126216169. The reversal of 126216138 is 831612621.

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

126216138 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126216131) 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, 10518006 + ... + 10518017.

It is an arithmetic number, because the mean of its divisors is an integer number (31554036).

Almost surely, 2^126216138 is an apocalyptic number.

126216138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

126216138 is a wasteful number, since it uses less digits than its factorization.

126216138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21036028.

The product of its digits is 3456, while the sum is 30.

The square root of 126216138 is about 11234.5955868469. The cubic root of 126216138 is about 501.6162869366.

Adding to 126216138 its reverse (831612621), we get a palindrome (957828759).

The spelling of 126216138 in words is "one hundred twenty-six million, two hundred sixteen thousand, one hundred thirty-eight".