1125445441 has 4 divisors (see below), whose sum is σ = 1191648132. Its totient is φ = 1059242752.

The previous prime is 1125445429. The next prime is 1125445459. The reversal of 1125445441 is 1445445211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 610337025 + 515108416 = 24705^2 + 22696^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125445441 - 2¹⁹ = 1124921153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125445141) 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, 33101320 + ... + 33101353.

It is an arithmetic number, because the mean of its divisors is an integer number (297912033).

Almost surely, 2^1125445441 is an apocalyptic number.

It is an amenable number.

1125445441 is a deficient number, since it is larger than the sum of its proper divisors (66202691).

1125445441 is an equidigital number, since it uses as much as digits as its factorization.

1125445441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66202690.

The product of its digits is 12800, while the sum is 31.

The square root of 1125445441 is about 33547.6592477031. The cubic root of 1125445441 is about 1040.1791607639.

The spelling of 1125445441 in words is "one billion, one hundred twenty-five million, four hundred forty-five thousand, four hundred forty-one".