2144521 has 8 divisors (see below), whose sum is σ = 2251080. Its totient is φ = 2040192.

The previous prime is 2144509. The next prime is 2144537. The reversal of 2144521 is 1254412.

2144521 = 1035² + 1036².

It can be written as a sum of positive squares in 4 ways, for example, as 10000 + 2134521 = 100^2 + 1461^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2144521 - 2⁵ = 2144489 is a prime.

It is a Duffinian number.

2144521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2144501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1611 + ... + 2623.

It is an arithmetic number, because the mean of its divisors is an integer number (281385).

It is a Poulet number, since it divides 2^2144520-1.

2^2144521 is an apocalyptic number.

2144521 is the 1036-th centered square number.

It is an amenable number.

2144521 is a deficient number, since it is larger than the sum of its proper divisors (106559).

2144521 is a wasteful number, since it uses less digits than its factorization.

2144521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115.

The product of its digits is 320, while the sum is 19.

The square root of 2144521 is about 1464.4183145536. The cubic root of 2144521 is about 128.9565584951.

Adding to 2144521 its reverse (1254412), we get a palindrome (3398933).

The spelling of 2144521 in words is "two million, one hundred forty-four thousand, five hundred twenty-one".