1125647730 has 24 divisors (see below), whose sum is σ = 2926684332. Its totient is φ = 300172704.

The previous prime is 1125647729. The next prime is 1125647753. The reversal of 1125647730 is 377465211.

It is a happy number.

1125647730 is a `hidden beast` number, since 1 + 1 + 2 + 5 + 647 + 7 + 3 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1091179089 + 34468641 = 33033^2 + 5871^2 .

It is a super-3 number, since 3×1125647730³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6253509 + ... + 6253688.

Almost surely, 2^1125647730 is an apocalyptic number.

1125647730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1125647730 is an abundant number, since it is smaller than the sum of its proper divisors (1801036602).

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

1125647730 is a wasteful number, since it uses less digits than its factorization.

1125647730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12507210 (or 12507207 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 1125647730 is about 33550.6740617830. The cubic root of 1125647730 is about 1040.2414780737.

The spelling of 1125647730 in words is "one billion, one hundred twenty-five million, six hundred forty-seven thousand, seven hundred thirty".