85440241 has 2 divisors, whose sum is σ = 85440242. Its totient is φ = 85440240.

The previous prime is 85440233. The next prime is 85440253. The reversal of 85440241 is 14204458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69472225 + 15968016 = 8335^2 + 3996^2 .

It is a cyclic number.

It is not a de Polignac number, because 85440241 - 2³ = 85440233 is a prime.

It is not a weakly prime, because it can be changed into another prime (85440281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42720120 + 42720121.

It is an arithmetic number, because the mean of its divisors is an integer number (42720121).

Almost surely, 2^85440241 is an apocalyptic number.

It is an amenable number.

85440241 is a deficient number, since it is larger than the sum of its proper divisors (1).

85440241 is an equidigital number, since it uses as much as digits as its factorization.

85440241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 85440241 is about 9243.3890429863. The cubic root of 85440241 is about 440.4407446568.

Adding to 85440241 its reverse (14204458), we get a palindrome (99644699).

The spelling of 85440241 in words is "eighty-five million, four hundred forty thousand, two hundred forty-one".