27091421 has 16 divisors (see below), whose sum is σ = 33134976. Its totient is φ = 21620736.

The previous prime is 27091409. The next prime is 27091429. The reversal of 27091421 is 12419072.

It is not a de Polignac number, because 27091421 - 2¹⁸ = 26829277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27091429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10370 + ... + 12716.

It is an arithmetic number, because the mean of its divisors is an integer number (2070936).

Almost surely, 2^27091421 is an apocalyptic number.

It is an amenable number.

27091421 is a deficient number, since it is larger than the sum of its proper divisors (6043555).

27091421 is a wasteful number, since it uses less digits than its factorization.

27091421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468.

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

The square root of 27091421 is about 5204.9419785431. The cubic root of 27091421 is about 300.3382148554.

The spelling of 27091421 in words is "twenty-seven million, ninety-one thousand, four hundred twenty-one".