1125540380 has 24 divisors (see below), whose sum is σ = 2369727360. Its totient is φ = 449055680.

The previous prime is 1125540337. The next prime is 1125540419. The reversal of 1125540380 is 830455211.

It is a super-2 number, since 2×1125540380² = 2533682294021088800, which contains 22 as substring.

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, 64556 + ... + 80115.

It is an arithmetic number, because the mean of its divisors is an integer number (98738640).

Almost surely, 2^1125540380 is an apocalyptic number.

1125540380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125540380 is an abundant number, since it is smaller than the sum of its proper divisors (1244186980).

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

1125540380 is a wasteful number, since it uses less digits than its factorization.

1125540380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145069 (or 145067 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1125540380 is about 33549.0742048123. The cubic root of 1125540380 is about 1040.2084086774.

Adding to 1125540380 its reverse (830455211), we get a palindrome (1955995591).

The spelling of 1125540380 in words is "one billion, one hundred twenty-five million, five hundred forty thousand, three hundred eighty".