27140921 has 4 divisors (see below), whose sum is σ = 27241344. Its totient is φ = 27040500.

The previous prime is 27140899. The next prime is 27140923. The reversal of 27140921 is 12904172.

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-27140921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27140923) 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, 49805 + ... + 50346.

It is an arithmetic number, because the mean of its divisors is an integer number (6810336).

Almost surely, 2^27140921 is an apocalyptic number.

It is an amenable number.

27140921 is a deficient number, since it is larger than the sum of its proper divisors (100423).

27140921 is a wasteful number, since it uses less digits than its factorization.

27140921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100422.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 27140921 is about 5209.6949046945. The cubic root of 27140921 is about 300.5210242183.

The spelling of 27140921 in words is "twenty-seven million, one hundred forty thousand, nine hundred twenty-one".