421434311 has 2 divisors, whose sum is σ = 421434312. Its totient is φ = 421434310.

The previous prime is 421434287. The next prime is 421434319. The reversal of 421434311 is 113434124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421434311 - 2²² = 417240007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421434319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210717155 + 210717156.

It is an arithmetic number, because the mean of its divisors is an integer number (210717156).

Almost surely, 2^421434311 is an apocalyptic number.

421434311 is a deficient number, since it is larger than the sum of its proper divisors (1).

421434311 is an equidigital number, since it uses as much as digits as its factorization.

421434311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 421434311 is about 20528.8653120429. The cubic root of 421434311 is about 749.7387599784.

Adding to 421434311 its reverse (113434124), we get a palindrome (534868435).

The spelling of 421434311 in words is "four hundred twenty-one million, four hundred thirty-four thousand, three hundred eleven".