27241221 has 8 divisors (see below), whose sum is σ = 41510464. Its totient is φ = 15566400.

The previous prime is 27241187. The next prime is 27241241. The reversal of 27241221 is 12214272.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27241221 - 2¹³ = 27233029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1297201 = 27241221 / (2 + 7 + 2 + 4 + 1 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27241241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648580 + ... + 648621.

It is an arithmetic number, because the mean of its divisors is an integer number (5188808).

Almost surely, 2^27241221 is an apocalyptic number.

27241221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27241221 is a deficient number, since it is larger than the sum of its proper divisors (14269243).

27241221 is a wasteful number, since it uses less digits than its factorization.

27241221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297211.

The product of its digits is 448, while the sum is 21.

The square root of 27241221 is about 5219.3123110234. The cubic root of 27241221 is about 300.8907636273.

Adding to 27241221 its reverse (12214272), we get a palindrome (39455493).

The spelling of 27241221 in words is "twenty-seven million, two hundred forty-one thousand, two hundred twenty-one".