1220814617 has 6 divisors (see below), whose sum is σ = 1341887274. Its totient is φ = 1109831360.

The previous prime is 1220814599. The next prime is 1220814641. The reversal of 1220814617 is 7164180221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1220524096 + 290521 = 34936^2 + 539^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1220814617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220816617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5044568 + ... + 5044809.

It is an arithmetic number, because the mean of its divisors is an integer number (223647879).

Almost surely, 2^1220814617 is an apocalyptic number.

It is an amenable number.

1220814617 is a deficient number, since it is larger than the sum of its proper divisors (121072657).

1220814617 is a wasteful number, since it uses less digits than its factorization.

1220814617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10089399 (or 10089388 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 1220814617 is about 34940.1576556260. The cubic root of 1220814617 is about 1068.7675030500.

Adding to 1220814617 its reverse (7164180221), we get a palindrome (8384994838).

The spelling of 1220814617 in words is "one billion, two hundred twenty million, eight hundred fourteen thousand, six hundred seventeen".