1125054138 has 64 divisors (see below), whose sum is σ = 2463068160. Its totient is φ = 340526592.

The previous prime is 1125054137. The next prime is 1125054187. The reversal of 1125054138 is 8314505211.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1125054137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1356708 + ... + 1357536.

It is an arithmetic number, because the mean of its divisors is an integer number (38485440).

Almost surely, 2^1125054138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125054138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1231534080).

1125054138 is an abundant number, since it is smaller than the sum of its proper divisors (1338014022).

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

1125054138 is a wasteful number, since it uses less digits than its factorization.

1125054138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 1125054138 is about 33541.8266944423. The cubic root of 1125054138 is about 1040.0585944551.

Adding to 1125054138 its reverse (8314505211), we get a palindrome (9439559349).

The spelling of 1125054138 in words is "one billion, one hundred twenty-five million, fifty-four thousand, one hundred thirty-eight".