85359121 has 3 divisors (see below), whose sum is σ = 85368361. Its totient is φ = 85349882.

The previous prime is 85359107. The next prime is 85359149. The reversal of 85359121 is 12195358.

The square root of 85359121 is 9239.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-85359121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85350121) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4620 + ... + 13858.

Almost surely, 2^85359121 is an apocalyptic number.

85359121 is the 9239-th square number.

85359121 is the 4620-th centered octagonal number.

It is an amenable number.

85359121 is a deficient number, since it is larger than the sum of its proper divisors (9240).

85359121 is an frugal number, since it uses more digits than its factorization.

85359121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18478 (or 9239 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The cubic root of 85359121 is about 440.3013104898.

The spelling of 85359121 in words is "eighty-five million, three hundred fifty-nine thousand, one hundred twenty-one".