1217606005 has 64 divisors (see below), whose sum is σ = 1860558336. Its totient is φ = 743040000.

The previous prime is 1217605967. The next prime is 1217606021. The reversal of 1217606005 is 5006067121.

It is not a de Polignac number, because 1217606005 - 2¹⁷ = 1217474933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6727015 + ... + 6727195.

It is an arithmetic number, because the mean of its divisors is an integer number (29071224).

Almost surely, 2^1217606005 is an apocalyptic number.

It is an amenable number.

1217606005 is a deficient number, since it is larger than the sum of its proper divisors (642952331).

1217606005 is a wasteful number, since it uses less digits than its factorization.

1217606005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1217606005 is about 34894.2116259989. The cubic root of 1217606005 is about 1067.8303504019.

It can be divided in two parts, 121760 and 6005, that added together give a triangular number (127765 = T₅₀₅).

The spelling of 1217606005 in words is "one billion, two hundred seventeen million, six hundred six thousand, five".