85725161 has 2 divisors, whose sum is σ = 85725162. Its totient is φ = 85725160.

The previous prime is 85725119. The next prime is 85725181. The reversal of 85725161 is 16152758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59969536 + 25755625 = 7744^2 + 5075^2 .

It is a cyclic number.

It is not a de Polignac number, because 85725161 - 2¹⁰ = 85724137 is a prime.

It is not a weakly prime, because it can be changed into another prime (85725181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42862580 + 42862581.

It is an arithmetic number, because the mean of its divisors is an integer number (42862581).

Almost surely, 2^85725161 is an apocalyptic number.

It is an amenable number.

85725161 is a deficient number, since it is larger than the sum of its proper divisors (1).

85725161 is an equidigital number, since it uses as much as digits as its factorization.

85725161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 35.

The square root of 85725161 is about 9258.7883116529. The cubic root of 85725161 is about 440.9297848766.

The spelling of 85725161 in words is "eighty-five million, seven hundred twenty-five thousand, one hundred sixty-one".