1145525521 has 8 divisors (see below), whose sum is σ = 1321883264. Its totient is φ = 972345600.

The previous prime is 1145525519. The next prime is 1145525567. The reversal of 1145525521 is 1255255411.

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

It is a cyclic number.

It is not a de Polignac number, because 1145525521 - 2¹ = 1145525519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145525321) 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, 793680 + ... + 795121.

It is an arithmetic number, because the mean of its divisors is an integer number (165235408).

Almost surely, 2^1145525521 is an apocalyptic number.

It is an amenable number.

1145525521 is a deficient number, since it is larger than the sum of its proper divisors (176357743).

1145525521 is a wasteful number, since it uses less digits than its factorization.

1145525521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588911.

The product of its digits is 10000, while the sum is 31.

The square root of 1145525521 is about 33845.6130244379. The cubic root of 1145525521 is about 1046.3289856328.

The spelling of 1145525521 in words is "one billion, one hundred forty-five million, five hundred twenty-five thousand, five hundred twenty-one".