1201566106 has 16 divisors (see below), whose sum is σ = 2007923400. Its totient is φ = 535445568.

The previous prime is 1201566101. The next prime is 1201566109. The reversal of 1201566106 is 6016651021.

It can be written as a sum of positive squares in 4 ways, for example, as 1118300481 + 83265625 = 33441^2 + 9125^2 .

It is a super-2 number, since 2×1201566106² = 2887522214176006472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1201566101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 796041 + ... + 797548.

Almost surely, 2^1201566106 is an apocalyptic number.

1201566106 is a deficient number, since it is larger than the sum of its proper divisors (806357294).

1201566106 is a wasteful number, since it uses less digits than its factorization.

1201566106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593633.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1201566106 is about 34663.6135738904. The cubic root of 1201566106 is about 1063.1206559865.

The spelling of 1201566106 in words is "one billion, two hundred one million, five hundred sixty-six thousand, one hundred six".