1125244521 has 8 divisors (see below), whose sum is σ = 1667028960. Its totient is φ = 750162996.

The previous prime is 1125244517. The next prime is 1125244553. The reversal of 1125244521 is 1254425211.

It is a happy number.

1125244521 is a `hidden beast` number, since 112 + 5 + 24 + 4 + 521 = 666.

It is not a de Polignac number, because 1125244521 - 2² = 1125244517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 41675723 = 1125244521 / (1 + 1 + 2 + 5 + 2 + 4 + 4 + 5 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (1125244121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20837835 + ... + 20837888.

It is an arithmetic number, because the mean of its divisors is an integer number (208378620).

Almost surely, 2^1125244521 is an apocalyptic number.

It is an amenable number.

1125244521 is a deficient number, since it is larger than the sum of its proper divisors (541784439).

1125244521 is an equidigital number, since it uses as much as digits as its factorization.

1125244521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41675732 (or 41675726 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1125244521 is about 33544.6645683036. The cubic root of 1125244521 is about 1040.1172577972.

Adding to 1125244521 its reverse (1254425211), we get a palindrome (2379669732).

The spelling of 1125244521 in words is "one billion, one hundred twenty-five million, two hundred forty-four thousand, five hundred twenty-one".