1125514813 has 4 divisors (see below), whose sum is σ = 1130224320. Its totient is φ = 1120805308.

The previous prime is 1125514807. The next prime is 1125514829. The reversal of 1125514813 is 3184155211.

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: 3184155211 = 30139 ⋅105649.

It is a cyclic number.

It is not a de Polignac number, because 1125514813 - 2¹⁷ = 1125383741 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 (1125514213) 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, 2354395 + ... + 2354872.

It is an arithmetic number, because the mean of its divisors is an integer number (282556080).

Almost surely, 2^1125514813 is an apocalyptic number.

It is an amenable number.

1125514813 is a deficient number, since it is larger than the sum of its proper divisors (4709507).

1125514813 is an equidigital number, since it uses as much as digits as its factorization.

1125514813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709506.

The product of its digits is 4800, while the sum is 31.

The square root of 1125514813 is about 33548.6931638179. The cubic root of 1125514813 is about 1040.2005323985.

The spelling of 1125514813 in words is "one billion, one hundred twenty-five million, five hundred fourteen thousand, eight hundred thirteen".