85751261 has 4 divisors (see below), whose sum is σ = 86836800. Its totient is φ = 84665724.

The previous prime is 85751243. The next prime is 85751273. The reversal of 85751261 is 16215758.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85751261 - 2¹⁴ = 85734877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85751221) 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, 542651 + ... + 542808.

It is an arithmetic number, because the mean of its divisors is an integer number (21709200).

Almost surely, 2^85751261 is an apocalyptic number.

It is an amenable number.

85751261 is a deficient number, since it is larger than the sum of its proper divisors (1085539).

85751261 is a wasteful number, since it uses less digits than its factorization.

85751261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085538.

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

The square root of 85751261 is about 9260.1976760758. The cubic root of 85751261 is about 440.9745290314.

The spelling of 85751261 in words is "eighty-five million, seven hundred fifty-one thousand, two hundred sixty-one".