85245121 has 12 divisors (see below), whose sum is σ = 93831420. Its totient is φ = 77388480.

The previous prime is 85245119. The next prime is 85245137. The reversal of 85245121 is 12154258.

It can be written as a sum of positive squares in 6 ways, for example, as 15689521 + 69555600 = 3961^2 + 8340^2 .

It is not a de Polignac number, because 85245121 - 2¹ = 85245119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85245121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85240121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6175 + ... + 14443.

It is an arithmetic number, because the mean of its divisors is an integer number (7819285).

Almost surely, 2^85245121 is an apocalyptic number.

It is an amenable number.

85245121 is a deficient number, since it is larger than the sum of its proper divisors (8586299).

85245121 is a wasteful number, since it uses less digits than its factorization.

85245121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8356 (or 8343 counting only the distinct ones).

The product of its digits is 3200, while the sum is 28.

The square root of 85245121 is about 9232.8284398661. The cubic root of 85245121 is about 440.1052107220.

Adding to 85245121 its reverse (12154258), we get a palindrome (97399379).

The spelling of 85245121 in words is "eighty-five million, two hundred forty-five thousand, one hundred twenty-one".