1125405312 has 32 divisors (see below), whose sum is σ = 2989358880. Its totient is φ = 375134976.

The previous prime is 1125405263. The next prime is 1125405319. The reversal of 1125405312 is 2135045211.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1125405319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1464988 + ... + 1465755.

It is an arithmetic number, because the mean of its divisors is an integer number (93417465).

Almost surely, 2^1125405312 is an apocalyptic number.

1125405312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1125405312 is an abundant number, since it is smaller than the sum of its proper divisors (1863953568).

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

1125405312 is an equidigital number, since it uses as much as digits as its factorization.

1125405312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930760 (or 2930748 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1125405312 is about 33547.0611529535. The cubic root of 1125405312 is about 1040.1667977047.

The spelling of 1125405312 in words is "one billion, one hundred twenty-five million, four hundred five thousand, three hundred twelve".