1125631617 has 16 divisors (see below), whose sum is σ = 1645052160. Its totient is φ = 678963600.

The previous prime is 1125631601. The next prime is 1125631627. The reversal of 1125631617 is 7161365211.

It is not a de Polignac number, because 1125631617 - 2⁴ = 1125631601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1125631627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73867 + ... + 87792.

It is an arithmetic number, because the mean of its divisors is an integer number (102815760).

Almost surely, 2^1125631617 is an apocalyptic number.

It is an amenable number.

1125631617 is a deficient number, since it is larger than the sum of its proper divisors (519420543).

1125631617 is a wasteful number, since it uses less digits than its factorization.

1125631617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161884.

The product of its digits is 7560, while the sum is 33.

The square root of 1125631617 is about 33550.4339316200. The cubic root of 1125631617 is about 1040.2365145638.

Adding to 1125631617 its reverse (7161365211), we get a palindrome (8286996828).

The spelling of 1125631617 in words is "one billion, one hundred twenty-five million, six hundred thirty-one thousand, six hundred seventeen".