1125618517 has 4 divisors (see below), whose sum is σ = 1125764320. Its totient is φ = 1125472716.

The previous prime is 1125618509. The next prime is 1125618541. The reversal of 1125618517 is 7158165211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7158165211 = 48649 ⋅147139.

It is a cyclic number.

It is not a de Polignac number, because 1125618517 - 2³ = 1125618509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125618217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60633 + ... + 76990.

It is an arithmetic number, because the mean of its divisors is an integer number (281441080).

Almost surely, 2^1125618517 is an apocalyptic number.

It is an amenable number.

1125618517 is a deficient number, since it is larger than the sum of its proper divisors (145803).

1125618517 is an equidigital number, since it uses as much as digits as its factorization.

1125618517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145802.

The product of its digits is 16800, while the sum is 37.

The square root of 1125618517 is about 33550.2387025786. The cubic root of 1125618517 is about 1040.2324791550.

The spelling of 1125618517 in words is "one billion, one hundred twenty-five million, six hundred eighteen thousand, five hundred seventeen".