3430021 has 4 divisors (see below), whose sum is σ = 3920032. Its totient is φ = 2940012.

The previous prime is 3429989. The next prime is 3430027. The reversal of 3430021 is 1200343.

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: 1200343 = 89 ⋅13487.

It is a cyclic number.

It is not a de Polignac number, because 3430021 - 2⁵ = 3429989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3429983 and 3430010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3430027) 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, 244995 + ... + 245008.

It is an arithmetic number, because the mean of its divisors is an integer number (980008).

Almost surely, 2^3430021 is an apocalyptic number.

It is an amenable number.

3430021 is a deficient number, since it is larger than the sum of its proper divisors (490011).

3430021 is an equidigital number, since it uses as much as digits as its factorization.

3430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490010.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 3430021 is about 1852.0315872036. The cubic root of 3430021 is about 150.8107360780.

Adding to 3430021 its reverse (1200343), we get a palindrome (4630364).

The spelling of 3430021 in words is "three million, four hundred thirty thousand, twenty-one".