420405053 has 4 divisors (see below), whose sum is σ = 445134780. Its totient is φ = 395675328.

The previous prime is 420405047. The next prime is 420405061. The reversal of 420405053 is 350504024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 237560569 + 182844484 = 15413^2 + 13522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420405053 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 (420405653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12364838 + ... + 12364871.

It is an arithmetic number, because the mean of its divisors is an integer number (111283695).

Almost surely, 2^420405053 is an apocalyptic number.

It is an amenable number.

420405053 is a deficient number, since it is larger than the sum of its proper divisors (24729727).

420405053 is a wasteful number, since it uses less digits than its factorization.

420405053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24729726.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 420405053 is about 20503.7814317262. The cubic root of 420405053 is about 749.1279066269.

Adding to 420405053 its reverse (350504024), we get a palindrome (770909077).

The spelling of 420405053 in words is "four hundred twenty million, four hundred five thousand, fifty-three".