3421421 has 4 divisors (see below), whose sum is σ = 3441372. Its totient is φ = 3401472.

The previous prime is 3421417. The next prime is 3421423. The reversal of 3421421 is 1241243.

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 2449225 + 972196 = 1565^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 3421421 - 2² = 3421417 is a prime.

It is a super-2 number, since 2×3421421² = 23412243318482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3421421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3421423) 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, 9716 + ... + 10061.

It is an arithmetic number, because the mean of its divisors is an integer number (860343).

Almost surely, 2^3421421 is an apocalyptic number.

It is an amenable number.

3421421 is a deficient number, since it is larger than the sum of its proper divisors (19951).

3421421 is a wasteful number, since it uses less digits than its factorization.

3421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19950.

The product of its digits is 192, while the sum is 17.

The square root of 3421421 is about 1849.7083553901. The cubic root of 3421421 is about 150.6845893481.

Adding to 3421421 its reverse (1241243), we get a palindrome (4662664).

The spelling of 3421421 in words is "three million, four hundred twenty-one thousand, four hundred twenty-one".