3020645 has 8 divisors (see below), whose sum is σ = 3838104. Its totient is φ = 2274304.

The previous prime is 3020617. The next prime is 3020651. The reversal of 3020645 is 5460203.

It is a Cunningham number, because it is equal to 1738²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1085764 + 1934881 = 1042^2 + 1391^2 .

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 3020645 - 2⁶ = 3020581 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 17684 + ... + 17853.

It is an arithmetic number, because the mean of its divisors is an integer number (479763).

Almost surely, 2^3020645 is an apocalyptic number.

It is an amenable number.

3020645 is a deficient number, since it is larger than the sum of its proper divisors (817459).

3020645 is a wasteful number, since it uses less digits than its factorization.

3020645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35559.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 3020645 is about 1738.0002876870. Note that the first 3 decimals coincide. The cubic root of 3020645 is about 144.5550370442. Note that the first 3 decimals are identical.

Adding to 3020645 its reverse (5460203), we get a palindrome (8480848).

The spelling of 3020645 in words is "three million, twenty thousand, six hundred forty-five".