4020453 has 6 divisors (see below), whose sum is σ = 5807334. Its totient is φ = 2680296.

The previous prime is 4020433. The next prime is 4020461. The reversal of 4020453 is 3540204.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3560769 + 459684 = 1887^2 + 678^2 .

It is not a de Polignac number, because 4020453 - 2⁸ = 4020197 is a prime.

4020453 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020433) 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 5 ways as a sum of consecutive naturals, for example, 223350 + ... + 223367.

It is an arithmetic number, because the mean of its divisors is an integer number (967889).

Almost surely, 2^4020453 is an apocalyptic number.

It is an amenable number.

4020453 is a deficient number, since it is larger than the sum of its proper divisors (1786881).

4020453 is a wasteful number, since it uses less digits than its factorization.

4020453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446723 (or 446720 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 4020453 is about 2005.1067303263. The cubic root of 4020453 is about 159.0102046376.

Adding to 4020453 its reverse (3540204), we get a palindrome (7560657).

Subtracting from 4020453 its reverse (3540204), we obtain a square (480249 = 693²).

The spelling of 4020453 in words is "four million, twenty thousand, four hundred fifty-three".