28495121 has 2 divisors, whose sum is σ = 28495122. Its totient is φ = 28495120.

The previous prime is 28495109. The next prime is 28495147. The reversal of 28495121 is 12159482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28302400 + 192721 = 5320^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 28495121 - 2⁶ = 28495057 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28495021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14247560 + 14247561.

It is an arithmetic number, because the mean of its divisors is an integer number (14247561).

Almost surely, 2^28495121 is an apocalyptic number.

It is an amenable number.

28495121 is a deficient number, since it is larger than the sum of its proper divisors (1).

28495121 is an equidigital number, since it uses as much as digits as its factorization.

28495121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 32.

The square root of 28495121 is about 5338.0821462394. The cubic root of 28495121 is about 305.4383055935.

The spelling of 28495121 in words is "twenty-eight million, four hundred ninety-five thousand, one hundred twenty-one".