4145021 has 8 divisors (see below), whose sum is σ = 4384800. Its totient is φ = 3907440.

The previous prime is 4145017. The next prime is 4145023. The reversal of 4145021 is 1205414.

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 4145021 - 2² = 4145017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4145023) 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, 4706 + ... + 5516.

It is an arithmetic number, because the mean of its divisors is an integer number (548100).

Almost surely, 2^4145021 is an apocalyptic number.

It is an amenable number.

4145021 is a deficient number, since it is larger than the sum of its proper divisors (239779).

4145021 is a wasteful number, since it uses less digits than its factorization.

4145021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 4145021 is about 2035.9324644988. The cubic root of 4145021 is about 160.6357646951.

The spelling of 4145021 in words is "four million, one hundred forty-five thousand, twenty-one".