1266201247 has 8 divisors (see below), whose sum is σ = 1274611520. Its totient is φ = 1257806880.

The previous prime is 1266201239. The next prime is 1266201253. The reversal of 1266201247 is 7421026621.

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 1266201247 - 2³ = 1266201239 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 (1266201947) 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, 184693 + ... + 191425.

It is an arithmetic number, because the mean of its divisors is an integer number (159326440).

Almost surely, 2^1266201247 is an apocalyptic number.

1266201247 is a deficient number, since it is larger than the sum of its proper divisors (8410273).

1266201247 is a wasteful number, since it uses less digits than its factorization.

1266201247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7953.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1266201247 is about 35583.7216575220. The cubic root of 1266201247 is about 1081.8513191402.

Adding to 1266201247 its reverse (7421026621), we get a palindrome (8687227868).

The spelling of 1266201247 in words is "one billion, two hundred sixty-six million, two hundred one thousand, two hundred forty-seven".