3998601 has 6 divisors (see below), whose sum is σ = 5775770. Its totient is φ = 2665728.

The previous prime is 3998591. The next prime is 3998609. The reversal of 3998601 is 1068993.

It can be written as a sum of positive squares in only one way, i.e., 2433600 + 1565001 = 1560^2 + 1251^2 .

It is not a de Polignac number, because 3998601 - 2⁶ = 3998537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3998609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222136 + ... + 222153.

Almost surely, 2^3998601 is an apocalyptic number.

It is an amenable number.

3998601 is a deficient number, since it is larger than the sum of its proper divisors (1777169).

3998601 is a wasteful number, since it uses less digits than its factorization.

3998601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444295 (or 444292 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 3998601 is about 1999.6502194134. The cubic root of 3998601 is about 158.7215965883.

The spelling of 3998601 in words is "three million, nine hundred ninety-eight thousand, six hundred one".