85258921 has 8 divisors (see below), whose sum is σ = 93429504. Its totient is φ = 77158320.

The previous prime is 85258891. The next prime is 85258939. The reversal of 85258921 is 12985258.

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 85258921 - 2⁷ = 85258793 is a prime.

It is a super-2 number, since 2×85258921² = 14538167220168482, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85258951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14926 + ... + 19831.

It is an arithmetic number, because the mean of its divisors is an integer number (11678688).

Almost surely, 2^85258921 is an apocalyptic number.

It is an amenable number.

85258921 is a deficient number, since it is larger than the sum of its proper divisors (8170583).

85258921 is a wasteful number, since it uses less digits than its factorization.

85258921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34991.

The product of its digits is 57600, while the sum is 40.

The square root of 85258921 is about 9233.5757429070. The cubic root of 85258921 is about 440.1289584124.

The spelling of 85258921 in words is "eighty-five million, two hundred fifty-eight thousand, nine hundred twenty-one".