1145112521 has 8 divisors (see below), whose sum is σ = 1310996544. Its totient is φ = 979802640.

The previous prime is 1145112511. The next prime is 1145112547. The reversal of 1145112521 is 1252115411.

It is a happy number.

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 1145112521 - 2²² = 1140918217 is a prime.

It is a super-2 number, since 2×1145112521² = 2622565371501950882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145112511) 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 7 ways as a sum of consecutive naturals, for example, 139250 + ... + 147243.

It is an arithmetic number, because the mean of its divisors is an integer number (163874568).

Almost surely, 2^1145112521 is an apocalyptic number.

It is an amenable number.

1145112521 is a deficient number, since it is larger than the sum of its proper divisors (165884023).

1145112521 is an equidigital number, since it uses as much as digits as its factorization.

1145112521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287071.

The product of its digits is 400, while the sum is 23.

The square root of 1145112521 is about 33839.5112405602. The cubic root of 1145112521 is about 1046.2032250666.

Adding to 1145112521 its reverse (1252115411), we get a palindrome (2397227932).

The spelling of 1145112521 in words is "one billion, one hundred forty-five million, one hundred twelve thousand, five hundred twenty-one".