1153125521 has 8 divisors (see below), whose sum is σ = 1263058920. Its totient is φ = 1047870208.

The previous prime is 1153125469. The next prime is 1153125529. The reversal of 1153125521 is 1255213511.

It can be written as a sum of positive squares in 4 ways, for example, as 733326400 + 419799121 = 27080^2 + 20489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1153125521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1153125529) 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, 1169006 + ... + 1169991.

It is an arithmetic number, because the mean of its divisors is an integer number (157882365).

Almost surely, 2^1153125521 is an apocalyptic number.

It is an amenable number.

1153125521 is a deficient number, since it is larger than the sum of its proper divisors (109933399).

1153125521 is a wasteful number, since it uses less digits than its factorization.

1153125521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339043.

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

The square root of 1153125521 is about 33957.7019393245. The cubic root of 1153125521 is about 1048.6378469616.

The spelling of 1153125521 in words is "one billion, one hundred fifty-three million, one hundred twenty-five thousand, five hundred twenty-one".