85850121 has 24 divisors (see below), whose sum is σ = 135513664. Its totient is φ = 47355840.

The previous prime is 85850111. The next prime is 85850131. The reversal of 85850121 is 12105858.

It is an interprime number because it is at equal distance from previous prime (85850111) and next prime (85850131).

It is not a de Polignac number, because 85850121 - 2⁶ = 85850057 is a prime.

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 (85850111) 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 23 ways as a sum of consecutive naturals, for example, 15231 + ... + 20091.

Almost surely, 2^85850121 is an apocalyptic number.

It is an amenable number.

85850121 is a deficient number, since it is larger than the sum of its proper divisors (49663543).

85850121 is a wasteful number, since it uses less digits than its factorization.

85850121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4929 (or 4900 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 85850121 is about 9265.5340374962. The cubic root of 85850121 is about 441.1439259559.

Adding to 85850121 its reverse (12105858), we get a palindrome (97955979).

The spelling of 85850121 in words is "eighty-five million, eight hundred fifty thousand, one hundred twenty-one".