3135521 has 4 divisors (see below), whose sum is σ = 3271872. Its totient is φ = 2999172.

The previous prime is 3135487. The next prime is 3135523. The reversal of 3135521 is 1255313.

3135521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 3135521 - 2¹⁰ = 3134497 is a prime.

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 = 3135493 and 3135502.

It is not an unprimeable number, because it can be changed into a prime (3135523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68141 + ... + 68186.

It is an arithmetic number, because the mean of its divisors is an integer number (817968).

Almost surely, 2^3135521 is an apocalyptic number.

It is an amenable number.

3135521 is a deficient number, since it is larger than the sum of its proper divisors (136351).

3135521 is a wasteful number, since it uses less digits than its factorization.

3135521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136350.

The product of its digits is 450, while the sum is 20.

The square root of 3135521 is about 1770.7402406903. The cubic root of 3135521 is about 146.3647756089.

The spelling of 3135521 in words is "three million, one hundred thirty-five thousand, five hundred twenty-one".