27942541 has 4 divisors (see below), whose sum is σ = 30482784. Its totient is φ = 25402300.

The previous prime is 27942517. The next prime is 27942553. The reversal of 27942541 is 14524972.

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 not a de Polignac number, because 27942541 - 2⁹ = 27942029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27942497 and 27942506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27942241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1270105 + ... + 1270126.

It is an arithmetic number, because the mean of its divisors is an integer number (7620696).

Almost surely, 2^27942541 is an apocalyptic number.

It is an amenable number.

27942541 is a deficient number, since it is larger than the sum of its proper divisors (2540243).

27942541 is a wasteful number, since it uses less digits than its factorization.

27942541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540242.

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

The square root of 27942541 is about 5286.0704686941. The cubic root of 27942541 is about 303.4510414113.

Subtracting from 27942541 its reverse (14524972), we obtain a square (13417569 = 3663²).

It can be divided in two parts, 2794 and 2541, that added together give a palindrome (5335).

The spelling of 27942541 in words is "twenty-seven million, nine hundred forty-two thousand, five hundred forty-one".