3998501 has 4 divisors (see below), whose sum is σ = 4306092. Its totient is φ = 3690912.

The previous prime is 3998497. The next prime is 3998521. The reversal of 3998501 is 1058993.

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 664225 + 3334276 = 815^2 + 1826^2 .

It is a cyclic number.

It is not a de Polignac number, because 3998501 - 2² = 3998497 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 (3998521) 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, 153776 + ... + 153801.

It is an arithmetic number, because the mean of its divisors is an integer number (1076523).

Almost surely, 2^3998501 is an apocalyptic number.

It is an amenable number.

3998501 is a deficient number, since it is larger than the sum of its proper divisors (307591).

3998501 is a wasteful number, since it uses less digits than its factorization.

3998501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307590.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 3998501 is about 1999.6252148840. The cubic root of 3998501 is about 158.7202734345.

The spelling of 3998501 in words is "three million, nine hundred ninety-eight thousand, five hundred one".