27426257 has 4 divisors (see below), whose sum is σ = 28372020. Its totient is φ = 26480496.

The previous prime is 27426251. The next prime is 27426293. The reversal of 27426257 is 75262472.

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 4682896 + 22743361 = 2164^2 + 4769^2 .

It is a cyclic number.

It is not a de Polignac number, because 27426257 - 2⁴ = 27426241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27426251) 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, 472838 + ... + 472895.

It is an arithmetic number, because the mean of its divisors is an integer number (7093005).

Almost surely, 2^27426257 is an apocalyptic number.

It is an amenable number.

27426257 is a deficient number, since it is larger than the sum of its proper divisors (945763).

27426257 is an equidigital number, since it uses as much as digits as its factorization.

27426257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945762.

The product of its digits is 47040, while the sum is 35.

The square root of 27426257 is about 5237.0084017500. The cubic root of 27426257 is about 301.5704937808.

The spelling of 27426257 in words is "twenty-seven million, four hundred twenty-six thousand, two hundred fifty-seven".