85747201 has 4 divisors (see below), whose sum is σ = 90791172. Its totient is φ = 80703232.

The previous prime is 85747091. The next prime is 85747213. The reversal of 85747201 is 10274758.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57017601 + 28729600 = 7551^2 + 5360^2 .

It is a cyclic number.

It is not a de Polignac number, because 85747201 - 2²⁵ = 52192769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85747231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2521960 + ... + 2521993.

It is an arithmetic number, because the mean of its divisors is an integer number (22697793).

Almost surely, 2^85747201 is an apocalyptic number.

It is an amenable number.

85747201 is a deficient number, since it is larger than the sum of its proper divisors (5043971).

85747201 is a wasteful number, since it uses less digits than its factorization.

85747201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5043970.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 85747201 is about 9259.9784556985. The cubic root of 85747201 is about 440.9675694259.

It can be divided in two parts, 85 and 747201, that multiplied together give a triangular number (63512085 = T₁₁₂₇₀).

The spelling of 85747201 in words is "eighty-five million, seven hundred forty-seven thousand, two hundred one".