4085749 has 2 divisors, whose sum is σ = 4085750. Its totient is φ = 4085748.

The previous prime is 4085747. The next prime is 4085761. The reversal of 4085749 is 9475804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2951524 + 1134225 = 1718^2 + 1065^2 .

It is a cyclic number.

It is not a de Polignac number, because 4085749 - 2¹ = 4085747 is a prime.

Together with 4085747, it forms a pair of twin primes.

4085749 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4085747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2042874 + 2042875.

It is an arithmetic number, because the mean of its divisors is an integer number (2042875).

Almost surely, 2^4085749 is an apocalyptic number.

It is an amenable number.

4085749 is a deficient number, since it is larger than the sum of its proper divisors (1).

4085749 is an equidigital number, since it uses as much as digits as its factorization.

4085749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 4085749 is about 2021.3235762737. The cubic root of 4085749 is about 159.8664119325.

The spelling of 4085749 in words is "four million, eighty-five thousand, seven hundred forty-nine".