4065997 has 8 divisors (see below), whose sum is σ = 4399416. Its totient is φ = 3735552.

The previous prime is 4065989. The next prime is 4066021. The reversal of 4065997 is 7995604.

It can be written as a sum of positive squares in 4 ways, for example, as 749956 + 3316041 = 866^2 + 1821^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4065997 - 2³ = 4065989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4065937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2733 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (549927).

Almost surely, 2^4065997 is an apocalyptic number.

It is an amenable number.

4065997 is a deficient number, since it is larger than the sum of its proper divisors (333419).

4065997 is a wasteful number, since it uses less digits than its factorization.

4065997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 4065997 is about 2016.4317494029. The cubic root of 4065997 is about 159.6083781717.

The spelling of 4065997 in words is "four million, sixty-five thousand, nine hundred ninety-seven".