86125021 has 2 divisors, whose sum is σ = 86125022. Its totient is φ = 86125020.

The previous prime is 86125003. The next prime is 86125057. The reversal of 86125021 is 12052168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45024100 + 41100921 = 6710^2 + 6411^2 .

It is a cyclic number.

It is not a de Polignac number, because 86125021 - 2⁷ = 86124893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86122021) 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, 43062510 + 43062511.

It is an arithmetic number, because the mean of its divisors is an integer number (43062511).

Almost surely, 2^86125021 is an apocalyptic number.

It is an amenable number.

86125021 is a deficient number, since it is larger than the sum of its proper divisors (1).

86125021 is an equidigital number, since it uses as much as digits as its factorization.

86125021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 86125021 is about 9280.3567280574. The cubic root of 86125021 is about 441.6142854377.

Adding to 86125021 its reverse (12052168), we get a palindrome (98177189).

The spelling of 86125021 in words is "eighty-six million, one hundred twenty-five thousand, twenty-one".