420342053 has 2 divisors, whose sum is σ = 420342054. Its totient is φ = 420342052.

The previous prime is 420342047. The next prime is 420342067. The reversal of 420342053 is 350243024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257345764 + 162996289 = 16042^2 + 12767^2 .

It is a cyclic number.

It is not a de Polignac number, because 420342053 - 2¹⁸ = 420079909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420342023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210171026 + 210171027.

It is an arithmetic number, because the mean of its divisors is an integer number (210171027).

Almost surely, 2^420342053 is an apocalyptic number.

It is an amenable number.

420342053 is a deficient number, since it is larger than the sum of its proper divisors (1).

420342053 is an equidigital number, since it uses as much as digits as its factorization.

420342053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 420342053 is about 20502.2450721866. The cubic root of 420342053 is about 749.0904844508.

Adding to 420342053 its reverse (350243024), we get a palindrome (770585077).

The spelling of 420342053 in words is "four hundred twenty million, three hundred forty-two thousand, fifty-three".