1125123540 has 24 divisors (see below), whose sum is σ = 3150346080. Its totient is φ = 300032928.

The previous prime is 1125123533. The next prime is 1125123577. The reversal of 1125123540 is 453215211.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1125123540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9375970 + ... + 9376089.

It is an arithmetic number, because the mean of its divisors is an integer number (131264420).

Almost surely, 2^1125123540 is an apocalyptic number.

1125123540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125123540 is an abundant number, since it is smaller than the sum of its proper divisors (2025222540).

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

1125123540 is a wasteful number, since it uses less digits than its factorization.

1125123540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18752071 (or 18752069 counting only the distinct ones).

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

The square root of 1125123540 is about 33542.8612375271. The cubic root of 1125123540 is about 1040.0799802889.

Adding to 1125123540 its reverse (453215211), we get a palindrome (1578338751).

The spelling of 1125123540 in words is "one billion, one hundred twenty-five million, one hundred twenty-three thousand, five hundred forty".