27253145 has 4 divisors (see below), whose sum is σ = 32703780. Its totient is φ = 21802512.

The previous prime is 27253139. The next prime is 27253147. The reversal of 27253145 is 54135272.

It is a happy number.

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 15031129 + 12222016 = 3877^2 + 3496^2 .

It is a cyclic number.

It is not a de Polignac number, because 27253145 - 2⁸ = 27252889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27253147) 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, 2725310 + ... + 2725319.

It is an arithmetic number, because the mean of its divisors is an integer number (8175945).

Almost surely, 2^27253145 is an apocalyptic number.

It is an amenable number.

27253145 is a deficient number, since it is larger than the sum of its proper divisors (5450635).

27253145 is an equidigital number, since it uses as much as digits as its factorization.

27253145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5450634.

The product of its digits is 8400, while the sum is 29.

The square root of 27253145 is about 5220.4544821308. The cubic root of 27253145 is about 300.9346590913.

The spelling of 27253145 in words is "twenty-seven million, two hundred fifty-three thousand, one hundred forty-five".