1217802852 has 36 divisors (see below), whose sum is σ = 3518097856. Its totient is φ = 347943600.

The previous prime is 1217802847. The next prime is 1217802899. The reversal of 1217802852 is 2582087121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2416024 + ... + 2416527.

Almost surely, 2^1217802852 is an apocalyptic number.

1217802852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1217802852 is an abundant number, since it is smaller than the sum of its proper divisors (2300295004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1217802852 is a wasteful number, since it uses less digits than its factorization.

1217802852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832568 (or 4832563 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 1217802852 is about 34897.0321374182. The cubic root of 1217802852 is about 1067.8878916957.

Adding to 1217802852 its reverse (2582087121), we get a palindrome (3799889973).

The spelling of 1217802852 in words is "one billion, two hundred seventeen million, eight hundred two thousand, eight hundred fifty-two".