1217064961 has 8 divisors (see below), whose sum is σ = 1392871680. Its totient is φ = 1041743328.

The previous prime is 1217064949. The next prime is 1217065001. The reversal of 1217064961 is 1694607121.

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

It is a cyclic number.

It is not a de Polignac number, because 1217064961 - 2²⁹ = 680194049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1217064961.

It is not an unprimeable number, because it can be changed into a prime (1217064911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115876 + ... + 125941.

It is an arithmetic number, because the mean of its divisors is an integer number (174108960).

Almost surely, 2^1217064961 is an apocalyptic number.

It is an amenable number.

1217064961 is a deficient number, since it is larger than the sum of its proper divisors (175806719).

1217064961 is an equidigital number, since it uses as much as digits as its factorization.

1217064961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242543.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1217064961 is about 34886.4581320604. The cubic root of 1217064961 is about 1067.6721632718.

The spelling of 1217064961 in words is "one billion, two hundred seventeen million, sixty-four thousand, nine hundred sixty-one".