1217108645 has 8 divisors (see below), whose sum is σ = 1460766840. Its totient is φ = 973529280.

The previous prime is 1217108611. The next prime is 1217108653. The reversal of 1217108645 is 5468017121.

1217108645 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 515017636 + 702091009 = 22694^2 + 26497^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1217108645 - 2¹⁰ = 1217107621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22475 + ... + 54215.

It is an arithmetic number, because the mean of its divisors is an integer number (182595855).

Almost surely, 2^1217108645 is an apocalyptic number.

It is an amenable number.

1217108645 is a deficient number, since it is larger than the sum of its proper divisors (243658195).

1217108645 is an equidigital number, since it uses as much as digits as its factorization.

1217108645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39415.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 1217108645 is about 34887.0842146488. The cubic root of 1217108645 is about 1067.6849370717.

The spelling of 1217108645 in words is "one billion, two hundred seventeen million, one hundred eight thousand, six hundred forty-five".