1128733725 has 48 divisors (see below), whose sum is σ = 2144862720. Its totient is φ = 513067200.

The previous prime is 1128733721. The next prime is 1128733757. The reversal of 1128733725 is 5273378211.

It is not a de Polignac number, because 1128733725 - 2² = 1128733721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128733721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87970 + ... + 99980.

It is an arithmetic number, because the mean of its divisors is an integer number (44684640).

Almost surely, 2^1128733725 is an apocalyptic number.

1128733725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1128733725 is a deficient number, since it is larger than the sum of its proper divisors (1016128995).

1128733725 is a wasteful number, since it uses less digits than its factorization.

1128733725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12210 (or 12205 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 1128733725 is about 33596.6326437636. The cubic root of 1128733725 is about 1041.1912277970.

The spelling of 1128733725 in words is "one billion, one hundred twenty-eight million, seven hundred thirty-three thousand, seven hundred twenty-five".