1125863709 has 32 divisors (see below), whose sum is σ = 1643120640. Its totient is φ = 682943232.

The previous prime is 1125863699. The next prime is 1125863729. The reversal of 1125863709 is 9073685211.

It is not a de Polignac number, because 1125863709 - 2⁴ = 1125863693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125863729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196122 + ... + 201780.

It is an arithmetic number, because the mean of its divisors is an integer number (51347520).

Almost surely, 2^1125863709 is an apocalyptic number.

It is an amenable number.

1125863709 is a deficient number, since it is larger than the sum of its proper divisors (517256931).

1125863709 is a wasteful number, since it uses less digits than its factorization.

1125863709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5809.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1125863709 is about 33553.8926057768. The cubic root of 1125863709 is about 1040.3080044953.

The spelling of 1125863709 in words is "one billion, one hundred twenty-five million, eight hundred sixty-three thousand, seven hundred nine".