1123571540 has 96 divisors (see below), whose sum is σ = 2927468544. Its totient is φ = 352719360.

The previous prime is 1123571507. The next prime is 1123571549. The reversal of 1123571540 is 451753211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123571549) 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, 228710 + ... + 233570.

It is an arithmetic number, because the mean of its divisors is an integer number (30494464).

Almost surely, 2^1123571540 is an apocalyptic number.

1123571540 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 1123571540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463734272).

1123571540 is an abundant number, since it is smaller than the sum of its proper divisors (1803897004).

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

1123571540 is a wasteful number, since it uses less digits than its factorization.

1123571540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5017 (or 5015 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 1123571540 is about 33519.7186742371. The cubic root of 1123571540 is about 1039.6015300404.

The spelling of 1123571540 in words is "one billion, one hundred twenty-three million, five hundred seventy-one thousand, five hundred forty".