4075121 has 4 divisors (see below), whose sum is σ = 4314852. Its totient is φ = 3835392.

The previous prime is 4075111. The next prime is 4075129. The reversal of 4075121 is 1215704.

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 1638400 + 2436721 = 1280^2 + 1561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4075121 is a prime.

It is a super-2 number, since 2×4075121² = 33213222329282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4075093 and 4075102.

It is not an unprimeable number, because it can be changed into a prime (4075129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119840 + ... + 119873.

It is an arithmetic number, because the mean of its divisors is an integer number (1078713).

Almost surely, 2^4075121 is an apocalyptic number.

It is an amenable number.

4075121 is a deficient number, since it is larger than the sum of its proper divisors (239731).

4075121 is a wasteful number, since it uses less digits than its factorization.

4075121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239730.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 4075121 is about 2018.6928939291. The cubic root of 4075121 is about 159.7276747774.

The spelling of 4075121 in words is "four million, seventy-five thousand, one hundred twenty-one".