1201272105 has 64 divisors (see below), whose sum is σ = 2241043200. Its totient is φ = 543006720.

The previous prime is 1201272073. The next prime is 1201272113. The reversal of 1201272105 is 5012721021.

It is not a de Polignac number, because 1201272105 - 2⁵ = 1201272073 is a prime.

It is a super-2 number, since 2×1201272105² = 2886109340502262050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 303781 + ... + 307709.

It is an arithmetic number, because the mean of its divisors is an integer number (35016300).

Almost surely, 2^1201272105 is an apocalyptic number.

1201272105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201272105 is a deficient number, since it is larger than the sum of its proper divisors (1039771095).

1201272105 is a wasteful number, since it uses less digits than its factorization.

1201272105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 1201272105 is about 34659.3725419258. The cubic root of 1201272105 is about 1063.0339402604.

Adding to 1201272105 its reverse (5012721021), we get a palindrome (6213993126).

The spelling of 1201272105 in words is "one billion, two hundred one million, two hundred seventy-two thousand, one hundred five".