1125870915 has 64 divisors (see below), whose sum is σ = 2030313600. Its totient is φ = 528912384.

The previous prime is 1125870913. The next prime is 1125870929. The reversal of 1125870915 is 5190785211.

It is a Cunningham number, because it is equal to 33554²-1.

It is not a de Polignac number, because 1125870915 - 2¹ = 1125870913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1125870913) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 502177 + ... + 504413.

It is an arithmetic number, because the mean of its divisors is an integer number (31723650).

Almost surely, 2^1125870915 is an apocalyptic number.

1125870915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1125870915 is a deficient number, since it is larger than the sum of its proper divisors (904442685).

1125870915 is a wasteful number, since it uses less digits than its factorization.

1125870915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376.

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

The square root of 1125870915 is about 33553.9999850986. Note that the first 4 decimals coincide. The cubic root of 1125870915 is about 1040.3102239598.

The spelling of 1125870915 in words is "one billion, one hundred twenty-five million, eight hundred seventy thousand, nine hundred fifteen".