27405601 has 4 divisors (see below), whose sum is σ = 27492372. Its totient is φ = 27318832.

The previous prime is 27405571. The next prime is 27405629. The reversal of 27405601 is 10650472.

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 2405601 + 25000000 = 1551^2 + 5000^2 .

It is a cyclic number.

It is not a de Polignac number, because 27405601 - 2⁵ = 27405569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27405401) 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, 42910 + ... + 43543.

It is an arithmetic number, because the mean of its divisors is an integer number (6873093).

Almost surely, 2^27405601 is an apocalyptic number.

It is an amenable number.

27405601 is a deficient number, since it is larger than the sum of its proper divisors (86771).

27405601 is an equidigital number, since it uses as much as digits as its factorization.

27405601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86770.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 27405601 is about 5235.0359120067. The cubic root of 27405601 is about 301.4947658069.

The spelling of 27405601 in words is "twenty-seven million, four hundred five thousand, six hundred one".