420145453 has 12 divisors (see below), whose sum is σ = 526336860. Its totient is φ = 332422272.

The previous prime is 420145421. The next prime is 420145477. The reversal of 420145453 is 354541024.

It can be written as a sum of positive squares in 2 ways, for example, as 283652964 + 136492489 = 16842^2 + 11683^2 .

It is not a de Polignac number, because 420145453 - 2⁵ = 420145421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420145403) 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, 329148 + ... + 330421.

It is an arithmetic number, because the mean of its divisors is an integer number (43861405).

Almost surely, 2^420145453 is an apocalyptic number.

It is an amenable number.

420145453 is a deficient number, since it is larger than the sum of its proper divisors (106191407).

420145453 is a wasteful number, since it uses less digits than its factorization.

420145453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659596 (or 659589 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 420145453 is about 20497.4499145625. The cubic root of 420145453 is about 748.9736794547.

Adding to 420145453 its reverse (354541024), we get a palindrome (774686477).

The spelling of 420145453 in words is "four hundred twenty million, one hundred forty-five thousand, four hundred fifty-three".