1125412381 has 2 divisors, whose sum is σ = 1125412382. Its totient is φ = 1125412380.

The previous prime is 1125412369. The next prime is 1125412391. The reversal of 1125412381 is 1832145211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1043871481 + 81540900 = 32309^2 + 9030^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125412381 - 2⁵ = 1125412349 is a prime.

It is a super-2 number, since 2×1125412381² = 2533106054616178322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125412331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562706190 + 562706191.

It is an arithmetic number, because the mean of its divisors is an integer number (562706191).

Almost surely, 2^1125412381 is an apocalyptic number.

It is an amenable number.

1125412381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125412381 is an equidigital number, since it uses as much as digits as its factorization.

1125412381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

The square root of 1125412381 is about 33547.1665122406. The cubic root of 1125412381 is about 1040.1689755642.

Adding to 1125412381 its reverse (1832145211), we get a palindrome (2957557592).

The spelling of 1125412381 in words is "one billion, one hundred twenty-five million, four hundred twelve thousand, three hundred eighty-one".