1125131555 has 8 divisors (see below), whose sum is σ = 1350610800. Its totient is φ = 899803296.

The previous prime is 1125131537. The next prime is 1125131561. The reversal of 1125131555 is 5551315211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1125131555 - 2²⁴ = 1108354339 is a prime.

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, 20645 + ... + 51734.

It is an arithmetic number, because the mean of its divisors is an integer number (168826350).

Almost surely, 2^1125131555 is an apocalyptic number.

1125131555 is a deficient number, since it is larger than the sum of its proper divisors (225479245).

1125131555 is an equidigital number, since it uses as much as digits as its factorization.

1125131555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75493.

The product of its digits is 3750, while the sum is 29.

The square root of 1125131555 is about 33542.9807113202. The cubic root of 1125131555 is about 1040.0824500091.

Adding to 1125131555 its reverse (5551315211), we get a palindrome (6676446766).

The spelling of 1125131555 in words is "one billion, one hundred twenty-five million, one hundred thirty-one thousand, five hundred fifty-five".