27145261 has 12 divisors (see below), whose sum is σ = 32134396. Its totient is φ = 22777920.

The previous prime is 27145253. The next prime is 27145271. The reversal of 27145261 is 16254172.

It can be written as a sum of positive squares in 2 ways, for example, as 2205225 + 24940036 = 1485^2 + 4994^2 .

It is not a de Polignac number, because 27145261 - 2³ = 27145253 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27145201) 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 11 ways as a sum of consecutive naturals, for example, 7056 + ... + 10201.

Almost surely, 2^27145261 is an apocalyptic number.

It is an amenable number.

27145261 is a deficient number, since it is larger than the sum of its proper divisors (4989135).

27145261 is a wasteful number, since it uses less digits than its factorization.

27145261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17292 (or 17281 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 27145261 is about 5210.1114191541. Note that the first 3 decimals coincide. The cubic root of 27145261 is about 300.5370417506.

The spelling of 27145261 in words is "twenty-seven million, one hundred forty-five thousand, two hundred sixty-one".