27042521 has 4 divisors (see below), whose sum is σ = 29500944. Its totient is φ = 24584100.

The previous prime is 27042511. The next prime is 27042527. The reversal of 27042521 is 12524072.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27042521 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (27042527) 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 3 ways as a sum of consecutive naturals, for example, 1229195 + ... + 1229216.

It is an arithmetic number, because the mean of its divisors is an integer number (7375236).

Almost surely, 2^27042521 is an apocalyptic number.

It is an amenable number.

27042521 is a deficient number, since it is larger than the sum of its proper divisors (2458423).

27042521 is a wasteful number, since it uses less digits than its factorization.

27042521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458422.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 27042521 is about 5200.2423981965. The cubic root of 27042521 is about 300.1574025855.

Adding to 27042521 its reverse (12524072), we get a palindrome (39566593).

It can be divided in two parts, 2704 and 2521, that added together give a palindrome (5225).

The spelling of 27042521 in words is "twenty-seven million, forty-two thousand, five hundred twenty-one".