1125442231 has 2 divisors, whose sum is σ = 1125442232. Its totient is φ = 1125442230.

The previous prime is 1125442223. The next prime is 1125442243. The reversal of 1125442231 is 1322445211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1125442231 - 2³ = 1125442223 is a prime.

It is a super-2 number, since 2×1125442231² = 2533240430636514722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1125442196 and 1125442205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125442261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562721115 + 562721116.

It is an arithmetic number, because the mean of its divisors is an integer number (562721116).

Almost surely, 2^1125442231 is an apocalyptic number.

1125442231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125442231 is an equidigital number, since it uses as much as digits as its factorization.

1125442231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 1125442231 is about 33547.6114052849. The cubic root of 1125442231 is about 1040.1781718286.

Adding to 1125442231 its reverse (1322445211), we get a palindrome (2447887442).

The spelling of 1125442231 in words is "one billion, one hundred twenty-five million, four hundred forty-two thousand, two hundred thirty-one".