85957261 has 4 divisors (see below), whose sum is σ = 92569372. Its totient is φ = 79345152.

The previous prime is 85957243. The next prime is 85957307. The reversal of 85957261 is 16275958.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16275958 = 2 ⋅8137979.

It can be written as a sum of positive squares in 2 ways, for example, as 50495236 + 35462025 = 7106^2 + 5955^2 .

It is a cyclic number.

It is not a de Polignac number, because 85957261 - 2⁷ = 85957133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85957231) 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, 3306036 + ... + 3306061.

It is an arithmetic number, because the mean of its divisors is an integer number (23142343).

Almost surely, 2^85957261 is an apocalyptic number.

It is an amenable number.

85957261 is a deficient number, since it is larger than the sum of its proper divisors (6612111).

85957261 is a wasteful number, since it uses less digits than its factorization.

85957261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6612110.

The product of its digits is 151200, while the sum is 43.

The square root of 85957261 is about 9271.3138766844. The cubic root of 85957261 is about 441.3273639118.

The spelling of 85957261 in words is "eighty-five million, nine hundred fifty-seven thousand, two hundred sixty-one".