85244261 has 2 divisors, whose sum is σ = 85244262. Its totient is φ = 85244260.

The previous prime is 85244221. The next prime is 85244281. The reversal of 85244261 is 16244258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75516100 + 9728161 = 8690^2 + 3119^2 .

It is a cyclic number.

It is not a de Polignac number, because 85244261 - 2⁶ = 85244197 is a prime.

It is a super-2 number, since 2×85244261² = 14533168066872242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_4957025 and since 85244261 and 4957025 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85244221) 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, 42622130 + 42622131.

It is an arithmetic number, because the mean of its divisors is an integer number (42622131).

Almost surely, 2^85244261 is an apocalyptic number.

It is an amenable number.

85244261 is a deficient number, since it is larger than the sum of its proper divisors (1).

85244261 is an equidigital number, since it uses as much as digits as its factorization.

85244261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 32.

The square root of 85244261 is about 9232.7818668048. The cubic root of 85244261 is about 440.1037307087.

The spelling of 85244261 in words is "eighty-five million, two hundred forty-four thousand, two hundred sixty-one".