85091281 has 8 divisors (see below), whose sum is σ = 94986144. Its totient is φ = 75556320.

The previous prime is 85091269. The next prime is 85091297. The reversal of 85091281 is 18219058.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85091281 - 2¹⁷ = 84960209 is a prime.

It is a super-2 number, since 2×85091281² = 14481052204441922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85091381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89476 + ... + 90421.

It is an arithmetic number, because the mean of its divisors is an integer number (11873268).

Almost surely, 2^85091281 is an apocalyptic number.

It is an amenable number.

85091281 is a deficient number, since it is larger than the sum of its proper divisors (9894863).

85091281 is a wasteful number, since it uses less digits than its factorization.

85091281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179951.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 85091281 is about 9224.4935362328. The cubic root of 85091281 is about 439.8403018930.

The spelling of 85091281 in words is "eighty-five million, ninety-one thousand, two hundred eighty-one".