1217070561 has 8 divisors (see below), whose sum is σ = 1854583744. Its totient is φ = 695468880.

The previous prime is 1217070559. The next prime is 1217070587. The reversal of 1217070561 is 1650707121.

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

It is not a de Polignac number, because 1217070561 - 2¹ = 1217070559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1217070541) 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, 28977850 + ... + 28977891.

It is an arithmetic number, because the mean of its divisors is an integer number (231822968).

Almost surely, 2^1217070561 is an apocalyptic number.

It is an amenable number.

1217070561 is a deficient number, since it is larger than the sum of its proper divisors (637513183).

1217070561 is an equidigital number, since it uses as much as digits as its factorization.

1217070561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57955751.

The product of its (nonzero) digits is 2940, while the sum is 30.

The square root of 1217070561 is about 34886.5383923370. The cubic root of 1217070561 is about 1067.6738008056.

Adding to 1217070561 its reverse (1650707121), we get a palindrome (2867777682).

The spelling of 1217070561 in words is "one billion, two hundred seventeen million, seventy thousand, five hundred sixty-one".