3420655 has 16 divisors (see below), whose sum is σ = 4968000. Its totient is φ = 2207232.

The previous prime is 3420653. The next prime is 3420667. The reversal of 3420655 is 5560243.

3420655 = T₃₆ + T₃₇ + ... + T₂₇₃.

It is a cyclic number.

It is not a de Polignac number, because 3420655 - 2¹ = 3420653 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3420653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2280 + ... + 3469.

It is an arithmetic number, because the mean of its divisors is an integer number (310500).

Almost surely, 2^3420655 is an apocalyptic number.

3420655 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3420655 is a deficient number, since it is larger than the sum of its proper divisors (1547345).

3420655 is a wasteful number, since it uses less digits than its factorization.

3420655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5778.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 3420655 is about 1849.5012841304. The cubic root of 3420655 is about 150.6733432401.

Adding to 3420655 its reverse (5560243), we get a palindrome (8980898).

It can be divided in two parts, 342065 and 5, that multiplied together give a triangular number (1710325 = T₁₈₄₉).

The spelling of 3420655 in words is "three million, four hundred twenty thousand, six hundred fifty-five".