1125725688 has 96 divisors (see below), whose sum is σ = 3176933760. Its totient is φ = 373442400.

The previous prime is 1125725677. The next prime is 1125725693. The reversal of 1125725688 is 8865275211.

1125725688 is a `hidden beast` number, since 1 + 12 + 5 + 72 + 568 + 8 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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, 440013 + ... + 442563.

It is an arithmetic number, because the mean of its divisors is an integer number (33093060).

Almost surely, 2^1125725688 is an apocalyptic number.

1125725688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125725688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1588466880).

1125725688 is an abundant number, since it is smaller than the sum of its proper divisors (2051208072).

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

1125725688 is a wasteful number, since it uses less digits than its factorization.

1125725688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2799 (or 2783 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 1125725688 is about 33551.8358365083. The cubic root of 1125725688 is about 1040.2654918840.

The spelling of 1125725688 in words is "one billion, one hundred twenty-five million, seven hundred twenty-five thousand, six hundred eighty-eight".