421042133 has 2 divisors, whose sum is σ = 421042134. Its totient is φ = 421042132.

The previous prime is 421042103. The next prime is 421042157. The reversal of 421042133 is 331240124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420373009 + 669124 = 20503^2 + 818^2 .

It is a cyclic number.

It is not a de Polignac number, because 421042133 - 2¹⁴ = 421025749 is a prime.

It is a super-2 number, since 2×421042133² = 354552955522379378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421042103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210521066 + 210521067.

It is an arithmetic number, because the mean of its divisors is an integer number (210521067).

Almost surely, 2^421042133 is an apocalyptic number.

It is an amenable number.

421042133 is a deficient number, since it is larger than the sum of its proper divisors (1).

421042133 is an equidigital number, since it uses as much as digits as its factorization.

421042133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 421042133 is about 20519.3112213836. The cubic root of 421042133 is about 749.5061240386.

Adding to 421042133 its reverse (331240124), we get a palindrome (752282257).

The spelling of 421042133 in words is "four hundred twenty-one million, forty-two thousand, one hundred thirty-three".