2121453 has 12 divisors (see below), whose sum is σ = 3107260. Its totient is φ = 1394496.

The previous prime is 2121443. The next prime is 2121461. The reversal of 2121453 is 3541212.

2121453 is a `hidden beast` number, since 212 + 1 + 453 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 915849 + 1205604 = 957^2 + 1098^2 .

It is not a de Polignac number, because 2121453 - 2⁶ = 2121389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 958 + ... + 2271.

2^2121453 is an apocalyptic number.

It is an amenable number.

2121453 is a deficient number, since it is larger than the sum of its proper divisors (985807).

2121453 is a wasteful number, since it uses less digits than its factorization.

2121453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308 (or 3305 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2121453 is about 1456.5208546396. The cubic root of 2121453 is about 128.4925076506.

Adding to 2121453 its reverse (3541212), we get a palindrome (5662665).

The spelling of 2121453 in words is "two million, one hundred twenty-one thousand, four hundred fifty-three".