1125136628 has 72 divisors (see below), whose sum is σ = 2536299360. Its totient is φ = 431766720.

The previous prime is 1125136613. The next prime is 1125136633. The reversal of 1125136628 is 8266315211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140558 + ... + 148346.

It is an arithmetic number, because the mean of its divisors is an integer number (35226380).

Almost surely, 2^1125136628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125136628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1268149680).

1125136628 is an abundant number, since it is smaller than the sum of its proper divisors (1411162732).

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

1125136628 is a wasteful number, since it uses less digits than its factorization.

1125136628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7885 (or 7876 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 1125136628 is about 33543.0563306327. The cubic root of 1125136628 is about 1040.0840131835.

The spelling of 1125136628 in words is "one billion, one hundred twenty-five million, one hundred thirty-six thousand, six hundred twenty-eight".