28125541 has 2 divisors, whose sum is σ = 28125542. Its totient is φ = 28125540.

The previous prime is 28125533. The next prime is 28125553. The reversal of 28125541 is 14552182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27352900 + 772641 = 5230^2 + 879^2 .

It is a cyclic number.

It is not a de Polignac number, because 28125541 - 2³ = 28125533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28125511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14062770 + 14062771.

It is an arithmetic number, because the mean of its divisors is an integer number (14062771).

Almost surely, 2^28125541 is an apocalyptic number.

It is an amenable number.

28125541 is a deficient number, since it is larger than the sum of its proper divisors (1).

28125541 is an equidigital number, since it uses as much as digits as its factorization.

28125541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3200, while the sum is 28.

The square root of 28125541 is about 5303.3518646230. The cubic root of 28125541 is about 304.1120496751.

The spelling of 28125541 in words is "twenty-eight million, one hundred twenty-five thousand, five hundred forty-one".