7825865 has 16 divisors (see below), whose sum is σ = 10378368. Its totient is φ = 5634816.

The previous prime is 7825861. The next prime is 7825889. The reversal of 7825865 is 5685287.

It is not a de Polignac number, because 7825865 - 2² = 7825861 is a prime.

It is a super-2 number, since 2×7825865² = 122488325996450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7825861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47 + ... + 3956.

It is an arithmetic number, because the mean of its divisors is an integer number (648648).

Almost surely, 2^7825865 is an apocalyptic number.

It is an amenable number.

7825865 is a deficient number, since it is larger than the sum of its proper divisors (2552503).

7825865 is a wasteful number, since it uses less digits than its factorization.

7825865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048.

The product of its digits is 134400, while the sum is 41.

The square root of 7825865 is about 2797.4747541309. The cubic root of 7825865 is about 198.5382169816.

The spelling of 7825865 in words is "seven million, eight hundred twenty-five thousand, eight hundred sixty-five".