1125809751 has 16 divisors (see below), whose sum is σ = 1733868288. Its totient is φ = 642172800.

The previous prime is 1125809653. The next prime is 1125809761. The reversal of 1125809751 is 1579085211.

It is not a de Polignac number, because 1125809751 - 2⁹ = 1125809239 is a prime.

It is a super-3 number, since 3×1125809751³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125809761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1002835 + ... + 1003956.

It is an arithmetic number, because the mean of its divisors is an integer number (108366768).

Almost surely, 2^1125809751 is an apocalyptic number.

1125809751 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1125809751 is a deficient number, since it is larger than the sum of its proper divisors (608058537).

1125809751 is a wasteful number, since it uses less digits than its factorization.

1125809751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006822.

The product of its (nonzero) digits is 25200, while the sum is 39.

The square root of 1125809751 is about 33553.0885463619. The cubic root of 1125809751 is about 1040.2913850071.

The spelling of 1125809751 in words is "one billion, one hundred twenty-five million, eight hundred nine thousand, seven hundred fifty-one".