1217422752 has 384 divisors, whose sum is σ = 4210569216. Its totient is φ = 299261952.

The previous prime is 1217422733. The next prime is 1217422753. The reversal of 1217422752 is 2572247121.

It is not an unprimeable number, because it can be changed into a prime (1217422753) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14667703 + ... + 14667785.

It is an arithmetic number, because the mean of its divisors is an integer number (10965024).

Almost surely, 2^1217422752 is an apocalyptic number.

1217422752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1217422752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2105284608).

1217422752 is an abundant number, since it is smaller than the sum of its proper divisors (2993146464).

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

1217422752 is a wasteful number, since it uses less digits than its factorization.

1217422752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 204 counting only the distinct ones).

The product of its digits is 15680, while the sum is 33.

The square root of 1217422752 is about 34891.5856905358. The cubic root of 1217422752 is about 1067.7767772614.

Adding to 1217422752 its reverse (2572247121), we get a palindrome (3789669873).

The spelling of 1217422752 in words is "one billion, two hundred seventeen million, four hundred twenty-two thousand, seven hundred fifty-two".