85345261 has 2 divisors, whose sum is σ = 85345262. Its totient is φ = 85345260.

The previous prime is 85345243. The next prime is 85345307. The reversal of 85345261 is 16254358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80910025 + 4435236 = 8995^2 + 2106^2 .

It is a cyclic number.

It is not a de Polignac number, because 85345261 - 2⁵ = 85345229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85345241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42672630 + 42672631.

It is an arithmetic number, because the mean of its divisors is an integer number (42672631).

Almost surely, 2^85345261 is an apocalyptic number.

It is an amenable number.

85345261 is a deficient number, since it is larger than the sum of its proper divisors (1).

85345261 is an equidigital number, since it uses as much as digits as its factorization.

85345261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 34.

The square root of 85345261 is about 9238.2498883717. The cubic root of 85345261 is about 440.2774782134.

The spelling of 85345261 in words is "eighty-five million, three hundred forty-five thousand, two hundred sixty-one".