1117284521 has 4 divisors (see below), whose sum is σ = 1117753812. Its totient is φ = 1116815232.

The previous prime is 1117284503. The next prime is 1117284529. The reversal of 1117284521 is 1254827111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 547794025 + 569490496 = 23405^2 + 23864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1117284521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1117284529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231056 + ... + 235841.

It is an arithmetic number, because the mean of its divisors is an integer number (279438453).

Almost surely, 2^1117284521 is an apocalyptic number.

It is an amenable number.

1117284521 is a deficient number, since it is larger than the sum of its proper divisors (469291).

1117284521 is an equidigital number, since it uses as much as digits as its factorization.

1117284521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469290.

The product of its digits is 4480, while the sum is 32.

The square root of 1117284521 is about 33425.8062131641. The cubic root of 1117284521 is about 1037.6588489734.

The spelling of 1117284521 in words is "one billion, one hundred seventeen million, two hundred eighty-four thousand, five hundred twenty-one".