27385021 has 4 divisors (see below), whose sum is σ = 27425344. Its totient is φ = 27344700.

The previous prime is 27385013. The next prime is 27385073. The reversal of 27385021 is 12058372.

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 not a de Polignac number, because 27385021 - 2³ = 27385013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27385081) 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, 19125 + ... + 20506.

It is an arithmetic number, because the mean of its divisors is an integer number (6856336).

Almost surely, 2^27385021 is an apocalyptic number.

It is an amenable number.

27385021 is a deficient number, since it is larger than the sum of its proper divisors (40323).

27385021 is an equidigital number, since it uses as much as digits as its factorization.

27385021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40322.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 27385021 is about 5233.0699402932. The cubic root of 27385021 is about 301.4192786092.

The spelling of 27385021 in words is "twenty-seven million, three hundred eighty-five thousand, twenty-one".