3066521 has 4 divisors (see below), whose sum is σ = 3199872. Its totient is φ = 2933172.

The previous prime is 3066517. The next prime is 3066529. The reversal of 3066521 is 1256603.

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: 1256603 = 19 ⋅66137.

It is a cyclic number.

It is not a de Polignac number, because 3066521 - 2² = 3066517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 133327 = 3066521 / (3 + 0 + 6 + 6 + 5 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3066529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66641 + ... + 66686.

It is an arithmetic number, because the mean of its divisors is an integer number (799968).

Almost surely, 2^3066521 is an apocalyptic number.

It is an amenable number.

3066521 is a deficient number, since it is larger than the sum of its proper divisors (133351).

3066521 is a wasteful number, since it uses less digits than its factorization.

3066521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133350.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 3066521 is about 1751.1484802837. The cubic root of 3066521 is about 145.2831723524.

The spelling of 3066521 in words is "three million, sixty-six thousand, five hundred twenty-one".