3587721 has 4 divisors (see below), whose sum is σ = 4783632. Its totient is φ = 2391812.

The previous prime is 3587719. The next prime is 3587741. The reversal of 3587721 is 1277853.

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 3587721 - 2¹ = 3587719 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3587711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597951 + ... + 597956.

It is an arithmetic number, because the mean of its divisors is an integer number (1195908).

Almost surely, 2^3587721 is an apocalyptic number.

It is an amenable number.

3587721 is a deficient number, since it is larger than the sum of its proper divisors (1195911).

3587721 is a wasteful number, since it uses less digits than its factorization.

3587721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195910.

The product of its digits is 11760, while the sum is 33.

The square root of 3587721 is about 1894.1280315755. The cubic root of 3587721 is about 153.0874377392.

The spelling of 3587721 in words is "three million, five hundred eighty-seven thousand, seven hundred twenty-one".