27121604 has 12 divisors (see below), whose sum is σ = 47499564. Its totient is φ = 13550304.

The previous prime is 27121603. The next prime is 27121609. The reversal of 27121604 is 40612172.

It can be written as a sum of positive squares in 2 ways, for example, as 6400900 + 20720704 = 2530^2 + 4552^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27121604.

It is not an unprimeable number, because it can be changed into a prime (27121603) 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, 7694 + ... + 10650.

It is an arithmetic number, because the mean of its divisors is an integer number (3958297).

Almost surely, 2^27121604 is an apocalyptic number.

It is an amenable number.

27121604 is a deficient number, since it is larger than the sum of its proper divisors (20377960).

27121604 is a wasteful number, since it uses less digits than its factorization.

27121604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5254 (or 5252 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 27121604 is about 5207.8406273618. The cubic root of 27121604 is about 300.4497107159.

Adding to 27121604 its reverse (40612172), we get a palindrome (67733776).

The spelling of 27121604 in words is "twenty-seven million, one hundred twenty-one thousand, six hundred four".