214521 has 8 divisors (see below), whose sum is σ = 298560. Its totient is φ = 136752.

The previous prime is 214519. The next prime is 214531. The reversal of 214521 is 125412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 214521 - 2¹ = 214519 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 214521.

It is not an unprimeable number, because it can be changed into a prime (214531) 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 7 ways as a sum of consecutive naturals, for example, 1486 + ... + 1623.

It is an arithmetic number, because the mean of its divisors is an integer number (37320).

2²¹⁴⁵²¹ is an apocalyptic number.

It is an amenable number.

214521 is a deficient number, since it is larger than the sum of its proper divisors (84039).

214521 is a wasteful number, since it uses less digits than its factorization.

214521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135.

The product of its digits is 80, while the sum is 15.

The square root of 214521 is about 463.1641177812. The cubic root of 214521 is about 59.8627417981.

Adding to 214521 its reverse (125412), we get a palindrome (339933).

The spelling of 214521 in words is "two hundred fourteen thousand, five hundred twenty-one".