1125991945 has 16 divisors (see below), whose sum is σ = 1458999360. Its totient is φ = 829289664.

The previous prime is 1125991913. The next prime is 1125992011. The reversal of 1125991945 is 5491995211.

1125991945 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1125991945 - 2⁵ = 1125991913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1125991895 and 1125991904.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1782 + ... + 47488.

It is an arithmetic number, because the mean of its divisors is an integer number (91187460).

Almost surely, 2^1125991945 is an apocalyptic number.

It is an amenable number.

1125991945 is a deficient number, since it is larger than the sum of its proper divisors (333007415).

1125991945 is a wasteful number, since it uses less digits than its factorization.

1125991945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46104.

The product of its digits is 145800, while the sum is 46.

The square root of 1125991945 is about 33555.8034473919. The cubic root of 1125991945 is about 1040.3475000611.

The spelling of 1125991945 in words is "one billion, one hundred twenty-five million, nine hundred ninety-one thousand, nine hundred forty-five".