3999601 has 4 divisors (see below), whose sum is σ = 4040932. Its totient is φ = 3958272.

The previous prime is 3999599. The next prime is 3999623. The reversal of 3999601 is 1069993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1069993 = 463 ⋅2311.

It can be written as a sum of positive squares in 2 ways, for example, as 1677025 + 2322576 = 1295^2 + 1524^2 .

It is a cyclic number.

It is not a de Polignac number, because 3999601 - 2¹ = 3999599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3999661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20520 + ... + 20713.

It is an arithmetic number, because the mean of its divisors is an integer number (1010233).

Almost surely, 2^3999601 is an apocalyptic number.

It is an amenable number.

3999601 is a deficient number, since it is larger than the sum of its proper divisors (41331).

3999601 is an equidigital number, since it uses as much as digits as its factorization.

3999601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41330.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 3999601 is about 1999.9002475124. The cubic root of 3999601 is about 158.7348269128.

It can be divided in two parts, 399 and 9601, that added together give a 4-th power (10000 = 10⁴).

The spelling of 3999601 in words is "three million, nine hundred ninety-nine thousand, six hundred one".