1206560217261 has 32 divisors (see below), whose sum is σ = 1903610699776. Its totient is φ = 665206344000.

The previous prime is 1206560217227. The next prime is 1206560217277. The reversal of 1206560217261 is 1627120656021.

It is not a de Polignac number, because 1206560217261 - 2⁷ = 1206560217133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206560217211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2584210 + ... + 3015171.

It is an arithmetic number, because the mean of its divisors is an integer number (59487834368).

Almost surely, 2^{1206560217261} is an apocalyptic number.

It is an amenable number.

1206560217261 is a deficient number, since it is larger than the sum of its proper divisors (697050482515).

1206560217261 is a wasteful number, since it uses less digits than its factorization.

1206560217261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599753.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 1206560217261 in words is "one trillion, two hundred six billion, five hundred sixty million, two hundred seventeen thousand, two hundred sixty-one".