1266305061 has 16 divisors (see below), whose sum is σ = 2043114624. Its totient is φ = 681037824.

The previous prime is 1266305059. The next prime is 1266305071. The reversal of 1266305061 is 1605036621.

It is not a de Polignac number, because 1266305061 - 2¹ = 1266305059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266305011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1773180 + ... + 1773893.

It is an arithmetic number, because the mean of its divisors is an integer number (127694664).

Almost surely, 2^1266305061 is an apocalyptic number.

It is an amenable number.

1266305061 is a deficient number, since it is larger than the sum of its proper divisors (776809563).

1266305061 is a wasteful number, since it uses less digits than its factorization.

1266305061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547100.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1266305061 is about 35585.1803564349. The cubic root of 1266305061 is about 1081.8808848046.

The spelling of 1266305061 in words is "one billion, two hundred sixty-six million, three hundred five thousand, sixty-one".