27445145 has 32 divisors (see below), whose sum is σ = 41395200. Its totient is φ = 17357760.

The previous prime is 27445129. The next prime is 27445147. The reversal of 27445145 is 54154472.

It is not a de Polignac number, because 27445145 - 2⁴ = 27445129 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27445147) 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 31 ways as a sum of consecutive naturals, for example, 21680 + ... + 22910.

It is an arithmetic number, because the mean of its divisors is an integer number (1293600).

Almost surely, 2^27445145 is an apocalyptic number.

It is an amenable number.

27445145 is a deficient number, since it is larger than the sum of its proper divisors (13950055).

27445145 is a wasteful number, since it uses less digits than its factorization.

27445145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270 (or 1256 counting only the distinct ones).

The product of its digits is 22400, while the sum is 32.

The square root of 27445145 is about 5238.8114109977. The cubic root of 27445145 is about 301.6397067299.

The spelling of 27445145 in words is "twenty-seven million, four hundred forty-five thousand, one hundred forty-five".