1125230231 has 4 divisors (see below), whose sum is σ = 1129292712. Its totient is φ = 1121167752.

The previous prime is 1125230207. The next prime is 1125230237. The reversal of 1125230231 is 1320325211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1320325211 = 409 ⋅3228179.

It is a cyclic number.

It is not a de Polignac number, because 1125230231 - 2¹⁴ = 1125213847 is a prime.

It is a super-2 number, since 2×1125230231² = 2532286145512626722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125230237) 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, 2030825 + ... + 2031378.

It is an arithmetic number, because the mean of its divisors is an integer number (282323178).

Almost surely, 2^1125230231 is an apocalyptic number.

1125230231 is a deficient number, since it is larger than the sum of its proper divisors (4062481).

1125230231 is an equidigital number, since it uses as much as digits as its factorization.

1125230231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062480.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1125230231 is about 33544.4515680313. The cubic root of 1125230231 is about 1040.1128548020.

Adding to 1125230231 its reverse (1320325211), we get a palindrome (2445555442).

The spelling of 1125230231 in words is "one billion, one hundred twenty-five million, two hundred thirty thousand, two hundred thirty-one".