4129121 has 4 divisors (see below), whose sum is σ = 4308672. Its totient is φ = 3949572.

The previous prime is 4129109. The next prime is 4129129. The reversal of 4129121 is 1219214.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1219214 = 2 ⋅609607.

It is a cyclic number.

It is not a de Polignac number, because 4129121 - 2⁶ = 4129057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4129093 and 4129102.

It is not an unprimeable number, because it can be changed into a prime (4129129) 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, 89741 + ... + 89786.

It is an arithmetic number, because the mean of its divisors is an integer number (1077168).

Almost surely, 2^4129121 is an apocalyptic number.

It is an amenable number.

4129121 is a deficient number, since it is larger than the sum of its proper divisors (179551).

4129121 is a wasteful number, since it uses less digits than its factorization.

4129121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179550.

The product of its digits is 144, while the sum is 20.

The square root of 4129121 is about 2032.0238679701. The cubic root of 4129121 is about 160.4301057911.

The spelling of 4129121 in words is "four million, one hundred twenty-nine thousand, one hundred twenty-one".