1125138 has 48 divisors (see below), whose sum is σ = 2708640. Its totient is φ = 310464.

The previous prime is 1125127. The next prime is 1125139. The reversal of 1125138 is 8315211.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1125139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12598 + ... + 12686.

It is an arithmetic number, because the mean of its divisors is an integer number (56430).

2^1125138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1354320).

1125138 is an abundant number, since it is smaller than the sum of its proper divisors (1583502).

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

1125138 is a wasteful number, since it uses less digits than its factorization.

1125138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 144 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

The square root of 1125138 is about 1060.7252236088. The cubic root of 1125138 is about 104.0084435945.

The spelling of 1125138 in words is "one million, one hundred twenty-five thousand, one hundred thirty-eight".