85280401 has 4 divisors (see below), whose sum is σ = 86062900. Its totient is φ = 84497904.

The previous prime is 85280399. The next prime is 85280413. The reversal of 85280401 is 10408258.

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 62964225 + 22316176 = 7935^2 + 4724^2 .

It is a cyclic number.

It is not a de Polignac number, because 85280401 - 2¹ = 85280399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85280401.

It is not an unprimeable number, because it can be changed into a prime (85280441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391086 + ... + 391303.

It is an arithmetic number, because the mean of its divisors is an integer number (21515725).

Almost surely, 2^85280401 is an apocalyptic number.

It is an amenable number.

85280401 is a deficient number, since it is larger than the sum of its proper divisors (782499).

85280401 is a wasteful number, since it uses less digits than its factorization.

85280401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782498.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 85280401 is about 9234.7388160142. The cubic root of 85280401 is about 440.1659171106.

Adding to 85280401 its reverse (10408258), we get a palindrome (95688659).

The spelling of 85280401 in words is "eighty-five million, two hundred eighty thousand, four hundred one".