3001521 has 4 divisors (see below), whose sum is σ = 4002032. Its totient is φ = 2001012.

The previous prime is 3001501. The next prime is 3001543. The reversal of 3001521 is 1251003.

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.

It is not a de Polignac number, because 3001521 - 2⁵ = 3001489 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3001497 and 3001506.

It is not an unprimeable number, because it can be changed into a prime (3001501) 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, 500251 + ... + 500256.

It is an arithmetic number, because the mean of its divisors is an integer number (1000508).

Almost surely, 2^3001521 is an apocalyptic number.

It is an amenable number.

3001521 is a deficient number, since it is larger than the sum of its proper divisors (1000511).

3001521 is a wasteful number, since it uses less digits than its factorization.

3001521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000510.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 3001521 is about 1732.4898268100. The cubic root of 3001521 is about 144.2493269304.

Adding to 3001521 its reverse (1251003), we get a palindrome (4252524).

The spelling of 3001521 in words is "three million, one thousand, five hundred twenty-one".