4210421 has 8 divisors (see below), whose sum is σ = 4309464. Its totient is φ = 4112640.

The previous prime is 4210411. The next prime is 4210429. The reversal of 4210421 is 1240124.

It can be written as a sum of positive squares in 4 ways, for example, as 52900 + 4157521 = 230^2 + 2039^2 .

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 4210421 - 2¹⁸ = 3948277 is a prime.

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 = 4210396 and 4210405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4210429) 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, 9791 + ... + 10211.

It is an arithmetic number, because the mean of its divisors is an integer number (538683).

Almost surely, 2^4210421 is an apocalyptic number.

It is an amenable number.

4210421 is a deficient number, since it is larger than the sum of its proper divisors (99043).

4210421 is a wasteful number, since it uses less digits than its factorization.

4210421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 4210421 is about 2051.9310417263. The cubic root of 4210421 is about 161.4761951833.

Adding to 4210421 its reverse (1240124), we get a palindrome (5450545).

The spelling of 4210421 in words is "four million, two hundred ten thousand, four hundred twenty-one".