27142021 has 4 divisors (see below), whose sum is σ = 27349344. Its totient is φ = 26934700.

The previous prime is 27141997. The next prime is 27142043. The reversal of 27142021 is 12024172.

It is a happy number.

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 27142021 - 2¹³ = 27133829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27142021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27142321) 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, 103465 + ... + 103726.

It is an arithmetic number, because the mean of its divisors is an integer number (6837336).

Almost surely, 2^27142021 is an apocalyptic number.

It is an amenable number.

27142021 is a deficient number, since it is larger than the sum of its proper divisors (207323).

27142021 is a wasteful number, since it uses less digits than its factorization.

27142021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207322.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 27142021 is about 5209.8004760259. The cubic root of 27142021 is about 300.5250841231.

Adding to 27142021 its reverse (12024172), we get a palindrome (39166193).

It can be divided in two parts, 271420 and 21, that added together give a square (271441 = 521²).

The spelling of 27142021 in words is "twenty-seven million, one hundred forty-two thousand, twenty-one".