3997121 has 8 divisors (see below), whose sum is σ = 4078464. Its totient is φ = 3916800.

The previous prime is 3997117. The next prime is 3997129. The reversal of 3997121 is 1217993.

It is a happy number.

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 3997121 - 2² = 3997117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3997129) 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, 15425 + ... + 15681.

It is an arithmetic number, because the mean of its divisors is an integer number (509808).

Almost surely, 2^3997121 is an apocalyptic number.

It is an amenable number.

3997121 is a deficient number, since it is larger than the sum of its proper divisors (81343).

3997121 is a wasteful number, since it uses less digits than its factorization.

3997121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511.

The product of its digits is 3402, while the sum is 32.

The square root of 3997121 is about 1999.2801204434. The cubic root of 3997121 is about 158.7020116592.

The spelling of 3997121 in words is "three million, nine hundred ninety-seven thousand, one hundred twenty-one".