27161121 has 32 divisors (see below), whose sum is σ = 41948928. Its totient is φ = 15482880.

The previous prime is 27161119. The next prime is 27161129. The reversal of 27161121 is 12116172.

It is a happy number.

It is not a de Polignac number, because 27161121 - 2¹ = 27161119 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27161129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46785 + ... + 47361.

It is an arithmetic number, because the mean of its divisors is an integer number (1310904).

Almost surely, 2^27161121 is an apocalyptic number.

It is an amenable number.

27161121 is a deficient number, since it is larger than the sum of its proper divisors (14787807).

27161121 is a wasteful number, since it uses less digits than its factorization.

27161121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681.

The product of its digits is 168, while the sum is 21.

The square root of 27161121 is about 5211.6332372875. The cubic root of 27161121 is about 300.5955613510.

Adding to 27161121 its reverse (12116172), we get a palindrome (39277293).

The spelling of 27161121 in words is "twenty-seven million, one hundred sixty-one thousand, one hundred twenty-one".