1153525121 has 16 divisors (see below), whose sum is σ = 1346880000. Its totient is φ = 987515424.

The previous prime is 1153525117. The next prime is 1153525133. The reversal of 1153525121 is 1215253511.

It is not a de Polignac number, because 1153525121 - 2² = 1153525117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153525151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376805 + ... + 379853.

It is an arithmetic number, because the mean of its divisors is an integer number (84180000).

Almost surely, 2^1153525121 is an apocalyptic number.

It is an amenable number.

1153525121 is a deficient number, since it is larger than the sum of its proper divisors (193354879).

1153525121 is an equidigital number, since it uses as much as digits as its factorization.

1153525121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173 (or 4159 counting only the distinct ones).

The product of its digits is 1500, while the sum is 26.

The square root of 1153525121 is about 33963.5852200559. The cubic root of 1153525121 is about 1048.7589633772.

Adding to 1153525121 its reverse (1215253511), we get a palindrome (2368778632).

The spelling of 1153525121 in words is "one billion, one hundred fifty-three million, five hundred twenty-five thousand, one hundred twenty-one".