27145121 has 4 divisors (see below), whose sum is σ = 27267072. Its totient is φ = 27023172.

The previous prime is 27145103. The next prime is 27145147. The reversal of 27145121 is 12154172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27145121 - 2¹⁴ = 27128737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27145021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60641 + ... + 61086.

It is an arithmetic number, because the mean of its divisors is an integer number (6816768).

Almost surely, 2^27145121 is an apocalyptic number.

It is an amenable number.

27145121 is a deficient number, since it is larger than the sum of its proper divisors (121951).

27145121 is a wasteful number, since it uses less digits than its factorization.

27145121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121950.

The product of its digits is 560, while the sum is 23.

The square root of 27145121 is about 5210.0979837235. The cubic root of 27145121 is about 300.5365250826.

Adding to 27145121 its reverse (12154172), we get a palindrome (39299293).

The spelling of 27145121 in words is "twenty-seven million, one hundred forty-five thousand, one hundred twenty-one".