85143725 has 6 divisors (see below), whose sum is σ = 105578250. Its totient is φ = 68114960.

The previous prime is 85143689. The next prime is 85143791. The reversal of 85143725 is 52734158.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 24649 + 85119076 = 157^2 + 9226^2 .

It is not a de Polignac number, because 85143725 - 2⁸ = 85143469 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1702850 + ... + 1702899.

It is an arithmetic number, because the mean of its divisors is an integer number (17596375).

Almost surely, 2^85143725 is an apocalyptic number.

It is an amenable number.

85143725 is a deficient number, since it is larger than the sum of its proper divisors (20434525).

85143725 is a wasteful number, since it uses less digits than its factorization.

85143725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405759 (or 3405754 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 85143725 is about 9227.3357476576. The cubic root of 85143725 is about 439.9306450602.

The spelling of 85143725 in words is "eighty-five million, one hundred forty-three thousand, seven hundred twenty-five".