1266061205 has 8 divisors (see below), whose sum is σ = 1522396032. Its totient is φ = 1010767248.

The previous prime is 1266061201. The next prime is 1266061211. The reversal of 1266061205 is 5021606621.

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 1266061205 - 2² = 1266061201 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 (1266061201) 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, 257537 + ... + 262406.

It is an arithmetic number, because the mean of its divisors is an integer number (190299504).

Almost surely, 2^1266061205 is an apocalyptic number.

It is an amenable number.

1266061205 is a deficient number, since it is larger than the sum of its proper divisors (256334827).

1266061205 is an equidigital number, since it uses as much as digits as its factorization.

1266061205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520435.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1266061205 is about 35581.7538213057. The cubic root of 1266061205 is about 1081.8114333773.

Adding to 1266061205 its reverse (5021606621), we get a palindrome (6287667826).

The spelling of 1266061205 in words is "one billion, two hundred sixty-six million, sixty-one thousand, two hundred five".