3420155 has 8 divisors (see below), whose sum is σ = 4116912. Its totient is φ = 2727648.

The previous prime is 3420139. The next prime is 3420161. The reversal of 3420155 is 5510243.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3420155 - 2⁴ = 3420139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1124 + ... + 2846.

It is an arithmetic number, because the mean of its divisors is an integer number (514614).

Almost surely, 2^3420155 is an apocalyptic number.

3420155 is a deficient number, since it is larger than the sum of its proper divisors (696757).

3420155 is a wasteful number, since it uses less digits than its factorization.

3420155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 3420155 is about 1849.3661076163. The cubic root of 3420155 is about 150.6660015329. Note that the first 3 decimals are identical.

Adding to 3420155 its reverse (5510243), we get a palindrome (8930398).

The spelling of 3420155 in words is "three million, four hundred twenty thousand, one hundred fifty-five".