12271995 has 48 divisors (see below), whose sum is σ = 22643712. Its totient is φ = 6135360.

The previous prime is 12271969. The next prime is 12271999. The reversal of 12271995 is 59917221.

It is not a de Polignac number, because 12271995 - 2⁷ = 12271867 is a prime.

It is a super-2 number, since 2×12271995² = 301203722560050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12271999) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73402 + ... + 73568.

It is an arithmetic number, because the mean of its divisors is an integer number (471744).

Almost surely, 2^12271995 is an apocalyptic number.

12271995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12271995 is a deficient number, since it is larger than the sum of its proper divisors (10371717).

12271995 is a wasteful number, since it uses less digits than its factorization.

12271995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 269 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 12271995 is about 3503.1407336846. The cubic root of 12271995 is about 230.6597002009.

The spelling of 12271995 in words is "twelve million, two hundred seventy-one thousand, nine hundred ninety-five".