4251985 has 4 divisors (see below), whose sum is σ = 5102388. Its totient is φ = 3401584.

The previous prime is 4251971. The next prime is 4252019. The reversal of 4251985 is 5891524.

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 1252161 + 2999824 = 1119^2 + 1732^2 .

It is a cyclic number.

It is not a de Polignac number, because 4251985 - 2⁷ = 4251857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4251985.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425194 + ... + 425203.

It is an arithmetic number, because the mean of its divisors is an integer number (1275597).

Almost surely, 2^4251985 is an apocalyptic number.

It is an amenable number.

4251985 is a deficient number, since it is larger than the sum of its proper divisors (850403).

4251985 is an equidigital number, since it uses as much as digits as its factorization.

4251985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850402.

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

The square root of 4251985 is about 2062.0341898232. The cubic root of 4251985 is about 162.0058042934.

The spelling of 4251985 in words is "four million, two hundred fifty-one thousand, nine hundred eighty-five".