3487521 has 4 divisors (see below), whose sum is σ = 4650032. Its totient is φ = 2325012.

The previous prime is 3487489. The next prime is 3487529. The reversal of 3487521 is 1257843.

3487521 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, and also an emirpimes, since its reverse is a distinct semiprime: 1257843 = 3 ⋅419281.

It is not a de Polignac number, because 3487521 - 2⁵ = 3487489 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3487529) 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, 581251 + ... + 581256.

It is an arithmetic number, because the mean of its divisors is an integer number (1162508).

Almost surely, 2^3487521 is an apocalyptic number.

It is an amenable number.

3487521 is a deficient number, since it is larger than the sum of its proper divisors (1162511).

3487521 is a wasteful number, since it uses less digits than its factorization.

3487521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162510.

The product of its digits is 6720, while the sum is 30.

The square root of 3487521 is about 1867.4905622251. The cubic root of 3487521 is about 151.6487880279.

The spelling of 3487521 in words is "three million, four hundred eighty-seven thousand, five hundred twenty-one".