3420625 has 20 divisors (see below), whose sum is σ = 4614148. Its totient is φ = 2520000.

The previous prime is 3420617. The next prime is 3420631. The reversal of 3420625 is 5260243.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 3411409 + 9216 = 1847^2 + 96^2 .

It is not a de Polignac number, because 3420625 - 2³ = 3420617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3420596 and 3420605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7915 + ... + 8335.

Almost surely, 2^3420625 is an apocalyptic number.

It is an amenable number.

3420625 is a deficient number, since it is larger than the sum of its proper divisors (1193523).

3420625 is an equidigital number, since it uses as much as digits as its factorization.

3420625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 3420625 is about 1849.4931738182. The cubic root of 3420625 is about 150.6729027579.

Adding to 3420625 its reverse (5260243), we get a palindrome (8680868).

The spelling of 3420625 in words is "three million, four hundred twenty thousand, six hundred twenty-five".