3402421 has 4 divisors (see below), whose sum is σ = 3711744. Its totient is φ = 3093100.

The previous prime is 3402407. The next prime is 3402437. The reversal of 3402421 is 1242043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1242043 = 11 ⋅112913.

It is a cyclic number.

It is not a de Polignac number, because 3402421 - 2⁵ = 3402389 is a prime.

It is a super-2 number, since 2×3402421² = 23152937322482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3402395 and 3402404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3402521) 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, 154645 + ... + 154666.

It is an arithmetic number, because the mean of its divisors is an integer number (927936).

Almost surely, 2^3402421 is an apocalyptic number.

It is an amenable number.

3402421 is a deficient number, since it is larger than the sum of its proper divisors (309323).

3402421 is a wasteful number, since it uses less digits than its factorization.

3402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309322.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 3402421 is about 1844.5652604340. The cubic root of 3402421 is about 150.4051417861.

Adding to 3402421 its reverse (1242043), we get a palindrome (4644464).

The spelling of 3402421 in words is "three million, four hundred two thousand, four hundred twenty-one".