85140001 has 4 divisors (see below), whose sum is σ = 85682452. Its totient is φ = 84597552.

The previous prime is 85139993. The next prime is 85140019. The reversal of 85140001 is 10004158.

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 19140625 + 65999376 = 4375^2 + 8124^2 .

It is a cyclic number.

It is not a de Polignac number, because 85140001 - 2³ = 85139993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85140061) 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, 270990 + ... + 271303.

It is an arithmetic number, because the mean of its divisors is an integer number (21420613).

Almost surely, 2^85140001 is an apocalyptic number.

It is an amenable number.

85140001 is a deficient number, since it is larger than the sum of its proper divisors (542451).

85140001 is a wasteful number, since it uses less digits than its factorization.

85140001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542450.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 85140001 is about 9227.1339537258. The cubic root of 85140001 is about 439.9242310992.

Adding to 85140001 its reverse (10004158), we get a palindrome (95144159).

It can be divided in two parts, 8514000 and 1, that added together give a triangular number (8514001 = T₄₁₂₆).

The spelling of 85140001 in words is "eighty-five million, one hundred forty thousand, one".