84025181 has 2 divisors, whose sum is σ = 84025182. Its totient is φ = 84025180.

The previous prime is 84025171. The next prime is 84025219. The reversal of 84025181 is 18152048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64080025 + 19945156 = 8005^2 + 4466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84025181 is a prime.

It is a super-2 number, since 2×84025181² = 14120462084165522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84025171) 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, 42012590 + 42012591.

It is an arithmetic number, because the mean of its divisors is an integer number (42012591).

Almost surely, 2^84025181 is an apocalyptic number.

It is an amenable number.

84025181 is a deficient number, since it is larger than the sum of its proper divisors (1).

84025181 is an equidigital number, since it uses as much as digits as its factorization.

84025181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 84025181 is about 9166.5250231481. The cubic root of 84025181 is about 437.9956717878.

The spelling of 84025181 in words is "eighty-four million, twenty-five thousand, one hundred eighty-one".