28125161 has 8 divisors (see below), whose sum is σ = 28575360. Its totient is φ = 27678672.

The previous prime is 28125127. The next prime is 28125169. The reversal of 28125161 is 16152182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28125161 - 2¹⁴ = 28108777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28125161.

It is not an unprimeable number, because it can be changed into a prime (28125169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16976 + ... + 18558.

It is an arithmetic number, because the mean of its divisors is an integer number (3571920).

Almost surely, 2^28125161 is an apocalyptic number.

It is an amenable number.

28125161 is a deficient number, since it is larger than the sum of its proper divisors (450199).

28125161 is a wasteful number, since it uses less digits than its factorization.

28125161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855.

The product of its digits is 960, while the sum is 26.

The square root of 28125161 is about 5303.3160381030. The cubic root of 28125161 is about 304.1106800647.

The spelling of 28125161 in words is "twenty-eight million, one hundred twenty-five thousand, one hundred sixty-one".