3407921 has 4 divisors (see below), whose sum is σ = 3717744. Its totient is φ = 3098100.

The previous prime is 3407909. The next prime is 3407941. The reversal of 3407921 is 1297043.

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.

It is a cyclic number.

It is not a de Polignac number, because 3407921 - 2⁶ = 3407857 is a prime.

It is a super-2 number, since 2×3407921² = 23227851084482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3407941) 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, 154895 + ... + 154916.

It is an arithmetic number, because the mean of its divisors is an integer number (929436).

Almost surely, 2^3407921 is an apocalyptic number.

It is an amenable number.

3407921 is a deficient number, since it is larger than the sum of its proper divisors (309823).

3407921 is a wasteful number, since it uses less digits than its factorization.

3407921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309822.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 3407921 is about 1846.0555246254. The cubic root of 3407921 is about 150.4861412609.

The spelling of 3407921 in words is "three million, four hundred seven thousand, nine hundred twenty-one".