1125211560 has 128 divisors (see below), whose sum is σ = 3702620160. Its totient is φ = 271289600.

The previous prime is 1125211541. The next prime is 1125211579. The reversal of 1125211560 is 651125211.

It is an interprime number because it is at equal distance from previous prime (1125211541) and next prime (1125211579).

It is a super-2 number, since 2×1125211560² = 2532202109515267200, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1125211560.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249889 + ... + 254351.

It is an arithmetic number, because the mean of its divisors is an integer number (28926720).

Almost surely, 2^1125211560 is an apocalyptic number.

1125211560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125211560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1851310080).

1125211560 is an abundant number, since it is smaller than the sum of its proper divisors (2577408600).

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

1125211560 is a wasteful number, since it uses less digits than its factorization.

1125211560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4679 (or 4675 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 1125211560 is about 33544.1732645179. The cubic root of 1125211560 is about 1040.1071018891.

Adding to 1125211560 its reverse (651125211), we get a palindrome (1776336771).

The spelling of 1125211560 in words is "one billion, one hundred twenty-five million, two hundred eleven thousand, five hundred sixty".