12115895 has 32 divisors (see below), whose sum is σ = 16727040. Its totient is φ = 8346240.

The previous prime is 12115889. The next prime is 12115903. The reversal of 12115895 is 59851121.

12115895 = T₄₆₀ + T₄₆₁ + ... + T₅₅₃.

It is not a de Polignac number, because 12115895 - 2⁸ = 12115639 is a prime.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 111101 + ... + 111209.

It is an arithmetic number, because the mean of its divisors is an integer number (522720).

Almost surely, 2^12115895 is an apocalyptic number.

12115895 is a deficient number, since it is larger than the sum of its proper divisors (4611145).

12115895 is a wasteful number, since it uses less digits than its factorization.

12115895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215.

The product of its digits is 3600, while the sum is 32.

The square root of 12115895 is about 3480.7894219559. The cubic root of 12115895 is about 229.6775253971.

The spelling of 12115895 in words is "twelve million, one hundred fifteen thousand, eight hundred ninety-five".