27720125 has 16 divisors (see below), whose sum is σ = 34791744. Its totient is φ = 22050000.

The previous prime is 27720101. The next prime is 27720137. The reversal of 27720125 is 52102772.

It is not a de Polignac number, because 27720125 - 2¹⁶ = 27654589 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27720094 and 27720103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25850 + ... + 26900.

It is an arithmetic number, because the mean of its divisors is an integer number (2174484).

Almost surely, 2^27720125 is an apocalyptic number.

27720125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27720125 is a deficient number, since it is larger than the sum of its proper divisors (7071619).

27720125 is a wasteful number, since it uses less digits than its factorization.

27720125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 27720125 is about 5264.9905033153. The cubic root of 27720125 is about 302.6437629161.

Adding to 27720125 its reverse (52102772), we get a palindrome (79822897).

It can be divided in two parts, 277 and 20125, that added together give a palindrome (20402).

The spelling of 27720125 in words is "twenty-seven million, seven hundred twenty thousand, one hundred twenty-five".