3421409 has 4 divisors (see below), whose sum is σ = 3504900. Its totient is φ = 3337920.

The previous prime is 3421399. The next prime is 3421417. The reversal of 3421409 is 9041243.

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 253009 + 3168400 = 503^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 3421409 - 2⁴ = 3421393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3421499) 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, 41684 + ... + 41765.

It is an arithmetic number, because the mean of its divisors is an integer number (876225).

Almost surely, 2^3421409 is an apocalyptic number.

It is an amenable number.

3421409 is a deficient number, since it is larger than the sum of its proper divisors (83491).

3421409 is an equidigital number, since it uses as much as digits as its factorization.

3421409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83490.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 3421409 is about 1849.7051116327. The cubic root of 3421409 is about 150.6844131818.

The spelling of 3421409 in words is "three million, four hundred twenty-one thousand, four hundred nine".