3420381 has 4 divisors (see below), whose sum is σ = 4560512. Its totient is φ = 2280252.

The previous prime is 3420371. The next prime is 3420401. The reversal of 3420381 is 1830243.

It is a happy number.

3420381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 1830243 = 3 ⋅610081.

It is not a de Polignac number, because 3420381 - 2⁷ = 3420253 is a prime.

It is a super-2 number, since 2×3420381² = 23398012370322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3420341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570061 + ... + 570066.

It is an arithmetic number, because the mean of its divisors is an integer number (1140128).

Almost surely, 2^3420381 is an apocalyptic number.

It is an amenable number.

3420381 is a deficient number, since it is larger than the sum of its proper divisors (1140131).

3420381 is a wasteful number, since it uses less digits than its factorization.

3420381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140130.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 3420381 is about 1849.4272086243. The cubic root of 3420381 is about 150.6693200732.

The spelling of 3420381 in words is "three million, four hundred twenty thousand, three hundred eighty-one".