27147021 has 32 divisors (see below), whose sum is σ = 40919040. Its totient is φ = 15868800.

The previous prime is 27146981. The next prime is 27147031. The reversal of 27147021 is 12074172.

It is not a de Polignac number, because 27147021 - 2⁶ = 27146957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27146982 and 27147000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27147031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142036 + ... + 142226.

It is an arithmetic number, because the mean of its divisors is an integer number (1278720).

Almost surely, 2^27147021 is an apocalyptic number.

It is an amenable number.

27147021 is a deficient number, since it is larger than the sum of its proper divisors (13772019).

27147021 is a wasteful number, since it uses less digits than its factorization.

27147021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 27147021 is about 5210.2803187545. The cubic root of 27147021 is about 300.5435368531.

The spelling of 27147021 in words is "twenty-seven million, one hundred forty-seven thousand, twenty-one".