27145965 has 64 divisors (see below), whose sum is σ = 57047040. Its totient is φ = 10679040.

The previous prime is 27145961. The next prime is 27145967. The reversal of 27145965 is 56954172.

It is not a de Polignac number, because 27145965 - 2² = 27145961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27145961) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21327 + ... + 22563.

It is an arithmetic number, because the mean of its divisors is an integer number (891360).

Almost surely, 2^27145965 is an apocalyptic number.

It is an amenable number.

27145965 is an abundant number, since it is smaller than the sum of its proper divisors (29901075).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27145965 is a wasteful number, since it uses less digits than its factorization.

27145965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282.

The product of its digits is 75600, while the sum is 39.

The square root of 27145965 is about 5210.1789796513. The cubic root of 27145965 is about 300.5396398253.

The spelling of 27145965 in words is "twenty-seven million, one hundred forty-five thousand, nine hundred sixty-five".