85109425 has 6 divisors (see below), whose sum is σ = 105535718. Its totient is φ = 68087520.

The previous prime is 85109419. The next prime is 85109441. The reversal of 85109425 is 52490158.

It can be written as a sum of positive squares in 3 ways, for example, as 9784384 + 75325041 = 3128^2 + 8679^2 .

It is not a de Polignac number, because 85109425 - 2⁵ = 85109393 is a prime.

It is a super-2 number, since 2×85109425² = 14487228447661250, which contains 22 as substring.

It is a Duffinian 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, 1702164 + ... + 1702213.

Almost surely, 2^85109425 is an apocalyptic number.

It is an amenable number.

85109425 is a deficient number, since it is larger than the sum of its proper divisors (20426293).

85109425 is a wasteful number, since it uses less digits than its factorization.

85109425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404387 (or 3404382 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 85109425 is about 9225.4769524399. The cubic root of 85109425 is about 439.8715620299.

The spelling of 85109425 in words is "eighty-five million, one hundred nine thousand, four hundred twenty-five".