1117801521 has 12 divisors (see below), whose sum is σ = 1699581520. Its totient is φ = 705979800.

The previous prime is 1117801513. The next prime is 1117801523. The reversal of 1117801521 is 1251087111.

It is not a de Polignac number, because 1117801521 - 2³ = 1117801513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1117801523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3268255 + ... + 3268596.

Almost surely, 2^1117801521 is an apocalyptic number.

It is an amenable number.

1117801521 is a deficient number, since it is larger than the sum of its proper divisors (581779999).

1117801521 is a wasteful number, since it uses less digits than its factorization.

1117801521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536876 (or 6536873 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 27.

The square root of 1117801521 is about 33433.5388644397. The cubic root of 1117801521 is about 1037.8188759225.

Adding to 1117801521 its reverse (1251087111), we get a palindrome (2368888632).

The spelling of 1117801521 in words is "one billion, one hundred seventeen million, eight hundred one thousand, five hundred twenty-one".