4017421 has 4 divisors (see below), whose sum is σ = 4038012. Its totient is φ = 3996832.

The previous prime is 4017407. The next prime is 4017427. The reversal of 4017421 is 1247104.

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 3276100 + 741321 = 1810^2 + 861^2 .

It is a cyclic number.

It is not a de Polignac number, because 4017421 - 2¹¹ = 4015373 is a prime.

It is a super-2 number, since 2×4017421² = 32279342982482, which contains 22 as substring.

It is a Duffinian number.

4017421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4017427) 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, 10000 + ... + 10393.

It is an arithmetic number, because the mean of its divisors is an integer number (1009503).

Almost surely, 2^4017421 is an apocalyptic number.

It is an amenable number.

4017421 is a deficient number, since it is larger than the sum of its proper divisors (20591).

4017421 is a wasteful number, since it uses less digits than its factorization.

4017421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20590.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 4017421 is about 2004.3505182477. The cubic root of 4017421 is about 158.9702223945.

The spelling of 4017421 in words is "four million, seventeen thousand, four hundred twenty-one".