421343053 has 2 divisors, whose sum is σ = 421343054. Its totient is φ = 421343052.

The previous prime is 421343051. The next prime is 421343077. The reversal of 421343053 is 350343124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288932004 + 132411049 = 16998^2 + 11507^2 .

It is a cyclic number.

It is not a de Polignac number, because 421343053 - 2¹ = 421343051 is a prime.

It is a super-2 number, since 2×421343053² = 355059936622721618, which contains 22 as substring.

Together with 421343051, it forms a pair of twin primes.

It is equal to p_22412158 and since 421343053 and 22412158 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421343051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210671526 + 210671527.

It is an arithmetic number, because the mean of its divisors is an integer number (210671527).

Almost surely, 2^421343053 is an apocalyptic number.

It is an amenable number.

421343053 is a deficient number, since it is larger than the sum of its proper divisors (1).

421343053 is an equidigital number, since it uses as much as digits as its factorization.

421343053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 421343053 is about 20526.6425164955. The cubic root of 421343053 is about 749.6846395638.

Adding to 421343053 its reverse (350343124), we get a palindrome (771686177).

The spelling of 421343053 in words is "four hundred twenty-one million, three hundred forty-three thousand, fifty-three".