5921521 has 4 divisors (see below), whose sum is σ = 6233200. Its totient is φ = 5609844.

The previous prime is 5921501. The next prime is 5921533. The reversal of 5921521 is 1251295.

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: 1251295 = 5 ⋅250259.

It is a cyclic number.

It is not a de Polignac number, because 5921521 - 2⁹ = 5921009 is a prime.

It is a Duffinian number.

5921521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5921501) 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, 155811 + ... + 155848.

It is an arithmetic number, because the mean of its divisors is an integer number (1558300).

Almost surely, 2^5921521 is an apocalyptic number.

It is an amenable number.

5921521 is a deficient number, since it is larger than the sum of its proper divisors (311679).

5921521 is a wasteful number, since it uses less digits than its factorization.

5921521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311678.

The product of its digits is 900, while the sum is 25.

The square root of 5921521 is about 2433.4175556201. The cubic root of 5921521 is about 180.9163252932.

The spelling of 5921521 in words is "five million, nine hundred twenty-one thousand, five hundred twenty-one".