85545121 has 4 divisors (see below), whose sum is σ = 85570452. Its totient is φ = 85519792.

The previous prime is 85545113. The next prime is 85545137. The reversal of 85545121 is 12154558.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81703521 + 3841600 = 9039^2 + 1960^2 .

It is a cyclic number.

It is not a de Polignac number, because 85545121 - 2³ = 85545113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85545101) 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, 6646 + ... + 14671.

It is an arithmetic number, because the mean of its divisors is an integer number (21392613).

Almost surely, 2^85545121 is an apocalyptic number.

It is an amenable number.

85545121 is a deficient number, since it is larger than the sum of its proper divisors (25331).

85545121 is a wasteful number, since it uses less digits than its factorization.

85545121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25330.

The product of its digits is 8000, while the sum is 31.

The square root of 85545121 is about 9249.0605468880. The cubic root of 85545121 is about 440.6208882536.

Adding to 85545121 its reverse (12154558), we get a palindrome (97699679).

The spelling of 85545121 in words is "eighty-five million, five hundred forty-five thousand, one hundred twenty-one".