27142945 has 16 divisors (see below), whose sum is σ = 33308928. Its totient is φ = 21228480.

The previous prime is 27142937. The next prime is 27142957. The reversal of 27142945 is 54924172.

It is not a de Polignac number, because 27142945 - 2³ = 27142937 is a prime.

It is a Duffinian number.

Its product of digits (20160) is a multiple of the sum of its prime divisors (720).

It is a self number, because there is not a number n which added to its sum of digits gives 27142945.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55492 + ... + 55978.

It is an arithmetic number, because the mean of its divisors is an integer number (2081808).

Almost surely, 2^27142945 is an apocalyptic number.

It is an amenable number.

27142945 is a deficient number, since it is larger than the sum of its proper divisors (6165983).

27142945 is a wasteful number, since it uses less digits than its factorization.

27142945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720.

The product of its digits is 20160, while the sum is 34.

The square root of 27142945 is about 5209.8891542911. The cubic root of 27142945 is about 300.5284943583.

The spelling of 27142945 in words is "twenty-seven million, one hundred forty-two thousand, nine hundred forty-five".