27042217 has 4 divisors (see below), whose sum is σ = 27295056. Its totient is φ = 26789380.

The previous prime is 27042203. The next prime is 27042221. The reversal of 27042217 is 71224072.

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 a de Polignac number, because none of the positive numbers 2^k-27042217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27042191 and 27042200.

It is not an unprimeable number, because it can be changed into a prime (27042017) 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, 126259 + ... + 126472.

It is an arithmetic number, because the mean of its divisors is an integer number (6823764).

Almost surely, 2^27042217 is an apocalyptic number.

It is an amenable number.

27042217 is a deficient number, since it is larger than the sum of its proper divisors (252839).

27042217 is a wasteful number, since it uses less digits than its factorization.

27042217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252838.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 27042217 is about 5200.2131687076. The cubic root of 27042217 is about 300.1562778359.

Adding to 27042217 its reverse (71224072), we get a palindrome (98266289).

The spelling of 27042217 in words is "twenty-seven million, forty-two thousand, two hundred seventeen".