27056921 has 4 divisors (see below), whose sum is σ = 27382992. Its totient is φ = 26730852.

The previous prime is 27056917. The next prime is 27056927. The reversal of 27056921 is 12965072.

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 27056921 - 2² = 27056917 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27056927) 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, 162911 + ... + 163076.

It is an arithmetic number, because the mean of its divisors is an integer number (6845748).

Almost surely, 2^27056921 is an apocalyptic number.

It is an amenable number.

27056921 is a deficient number, since it is larger than the sum of its proper divisors (326071).

27056921 is an equidigital number, since it uses as much as digits as its factorization.

27056921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326070.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 27056921 is about 5201.6267647727. The cubic root of 27056921 is about 300.2106705436.

The spelling of 27056921 in words is "twenty-seven million, fifty-six thousand, nine hundred twenty-one".