4025985 has 16 divisors (see below), whose sum is σ = 6510336. Its totient is φ = 2124288.

The previous prime is 4025981. The next prime is 4025993. The reversal of 4025985 is 5895204.

4025985 = 630² + 631² + ... + 639².

It is not a de Polignac number, because 4025985 - 2² = 4025981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4025981) 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, 72 + ... + 2838.

It is an arithmetic number, because the mean of its divisors is an integer number (406896).

Almost surely, 2^4025985 is an apocalyptic number.

It is an amenable number.

4025985 is a deficient number, since it is larger than the sum of its proper divisors (2484351).

4025985 is a wasteful number, since it uses less digits than its factorization.

4025985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 4025985 is about 2006.4857338142. The cubic root of 4025985 is about 159.0831020040.

The spelling of 4025985 in words is "four million, twenty-five thousand, nine hundred eighty-five".