1266560247 has 8 divisors (see below), whose sum is σ = 1689148656. Its totient is φ = 844172672.

The previous prime is 1266560221. The next prime is 1266560249. The reversal of 1266560247 is 7420656621.

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 1266560247 - 2¹⁹ = 1266035959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266560249) 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, 34818 + ... + 61199.

It is an arithmetic number, because the mean of its divisors is an integer number (211143582).

Almost surely, 2^1266560247 is an apocalyptic number.

1266560247 is a deficient number, since it is larger than the sum of its proper divisors (422588409).

1266560247 is an equidigital number, since it uses as much as digits as its factorization.

1266560247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100417.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 1266560247 is about 35588.7657414527. The cubic root of 1266560247 is about 1081.9535535269.

The spelling of 1266560247 in words is "one billion, two hundred sixty-six million, five hundred sixty thousand, two hundred forty-seven".