420242653 has 2 divisors, whose sum is σ = 420242654. Its totient is φ = 420242652.

The previous prime is 420242623. The next prime is 420242657. The reversal of 420242653 is 356242024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211353444 + 208889209 = 14538^2 + 14453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420242653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420242657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210121326 + 210121327.

It is an arithmetic number, because the mean of its divisors is an integer number (210121327).

Almost surely, 2^420242653 is an apocalyptic number.

It is an amenable number.

420242653 is a deficient number, since it is larger than the sum of its proper divisors (1).

420242653 is an equidigital number, since it uses as much as digits as its factorization.

420242653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 420242653 is about 20499.8208040948. The cubic root of 420242653 is about 749.0314329682.

Adding to 420242653 its reverse (356242024), we get a palindrome (776484677).

The spelling of 420242653 in words is "four hundred twenty million, two hundred forty-two thousand, six hundred fifty-three".