85280121 has 12 divisors (see below), whose sum is σ = 127745072. Its totient is φ = 56853252.

The previous prime is 85280099. The next prime is 85280131. The reversal of 85280121 is 12108258.

It is not a de Polignac number, because 85280121 - 2⁵ = 85280089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85280131) 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 11 ways as a sum of consecutive naturals, for example, 175231 + ... + 175716.

Almost surely, 2^85280121 is an apocalyptic number.

85280121 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

85280121 is a deficient number, since it is larger than the sum of its proper divisors (42464951).

85280121 is an equidigital number, since it uses as much as digits as its factorization.

85280121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350962 (or 350950 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 85280121 is about 9234.7236558546. The cubic root of 85280121 is about 440.1654353798.

Adding to 85280121 its reverse (12108258), we get a palindrome (97388379).

The spelling of 85280121 in words is "eighty-five million, two hundred eighty thousand, one hundred twenty-one".