27142661 has 16 divisors (see below), whose sum is σ = 33884928. Its totient is φ = 21168000.

The previous prime is 27142651. The next prime is 27142673. The reversal of 27142661 is 16624172.

It is not a de Polignac number, because 27142661 - 2¹⁰ = 27141637 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 (27142651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4361 + ... + 8561.

It is an arithmetic number, because the mean of its divisors is an integer number (2117808).

Almost surely, 2^27142661 is an apocalyptic number.

It is an amenable number.

27142661 is a deficient number, since it is larger than the sum of its proper divisors (6742267).

27142661 is a wasteful number, since it uses less digits than its factorization.

27142661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292.

The product of its digits is 4032, while the sum is 29.

The square root of 27142661 is about 5209.8618983616. The cubic root of 27142661 is about 300.5274461990.

The spelling of 27142661 in words is "twenty-seven million, one hundred forty-two thousand, six hundred sixty-one".