4197121 has 4 divisors (see below), whose sum is σ = 4332544. Its totient is φ = 4061700.

The previous prime is 4197107. The next prime is 4197133. The reversal of 4197121 is 1217914.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4197121 - 2⁷ = 4196993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4197161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67665 + ... + 67726.

It is an arithmetic number, because the mean of its divisors is an integer number (1083136).

Almost surely, 2^4197121 is an apocalyptic number.

It is an amenable number.

4197121 is a deficient number, since it is larger than the sum of its proper divisors (135423).

4197121 is a wasteful number, since it uses less digits than its factorization.

4197121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135422.

The product of its digits is 504, while the sum is 25.

The square root of 4197121 is about 2048.6876287028. The cubic root of 4197121 is about 161.3059906117.

The spelling of 4197121 in words is "four million, one hundred ninety-seven thousand, one hundred twenty-one".