27420245 has 4 divisors (see below), whose sum is σ = 32904300. Its totient is φ = 21936192.

The previous prime is 27420229. The next prime is 27420299. The reversal of 27420245 is 54202472.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12124324 + 15295921 = 3482^2 + 3911^2 .

It is a cyclic number.

It is not a de Polignac number, because 27420245 - 2⁴ = 27420229 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2742020 + ... + 2742029.

It is an arithmetic number, because the mean of its divisors is an integer number (8226075).

Almost surely, 2^27420245 is an apocalyptic number.

It is an amenable number.

27420245 is a deficient number, since it is larger than the sum of its proper divisors (5484055).

27420245 is an equidigital number, since it uses as much as digits as its factorization.

27420245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484054.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 27420245 is about 5236.4343784679. The cubic root of 27420245 is about 301.5484568169.

It can be divided in two parts, 2 and 7420245, that added together give a palindrome (7420247).

The spelling of 27420245 in words is "twenty-seven million, four hundred twenty thousand, two hundred forty-five".