40828121 has 2 divisors, whose sum is σ = 40828122. Its totient is φ = 40828120.

The previous prime is 40828103. The next prime is 40828133. The reversal of 40828121 is 12182804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28472896 + 12355225 = 5336^2 + 3515^2 .

It is a cyclic number.

It is not a de Polignac number, because 40828121 - 2¹⁰ = 40827097 is a prime.

It is not a weakly prime, because it can be changed into another prime (40828141) by changing a digit.

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 as a sum of consecutive naturals, namely, 20414060 + 20414061.

It is an arithmetic number, because the mean of its divisors is an integer number (20414061).

Almost surely, 2^40828121 is an apocalyptic number.

It is an amenable number.

40828121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40828121 is an equidigital number, since it uses as much as digits as its factorization.

40828121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 40828121 is about 6389.6886465617. The cubic root of 40828121 is about 344.3391986194.

The spelling of 40828121 in words is "forty million, eight hundred twenty-eight thousand, one hundred twenty-one".