1125445131 has 16 divisors (see below), whose sum is σ = 1739819520. Its totient is φ = 717674760.

The previous prime is 1125445103. The next prime is 1125445141. The reversal of 1125445131 is 1315445211.

1125445131 is a `hidden beast` number, since 112 + 544 + 5 + 1 + 3 + 1 = 666.

It is not a de Polignac number, because 1125445131 - 2¹⁰ = 1125444107 is a prime.

It is a super-2 number, since 2×1125445131² = 2533253485783214322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1125445095 and 1125445104.

It is not an unprimeable number, because it can be changed into a prime (1125445141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905535 + ... + 906776.

It is an arithmetic number, because the mean of its divisors is an integer number (108738720).

Almost surely, 2^1125445131 is an apocalyptic number.

1125445131 is a deficient number, since it is larger than the sum of its proper divisors (614374389).

1125445131 is a wasteful number, since it uses less digits than its factorization.

1125445131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812343 (or 1812337 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1125445131 is about 33547.6546274102. The cubic root of 1125445131 is about 1040.1790652593.

The spelling of 1125445131 in words is "one billion, one hundred twenty-five million, four hundred forty-five thousand, one hundred thirty-one".