421243411 has 2 divisors, whose sum is σ = 421243412. Its totient is φ = 421243410.

The previous prime is 421243397. The next prime is 421243423. The reversal of 421243411 is 114342124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421243411 - 2¹¹ = 421241363 is a prime.

It is a super-2 number, since 2×421243411² = 354892022621829842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421243441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210621705 + 210621706.

It is an arithmetic number, because the mean of its divisors is an integer number (210621706).

Almost surely, 2^421243411 is an apocalyptic number.

421243411 is a deficient number, since it is larger than the sum of its proper divisors (1).

421243411 is an equidigital number, since it uses as much as digits as its factorization.

421243411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 22.

The square root of 421243411 is about 20524.2152346929. The cubic root of 421243411 is about 749.6255381059.

Adding to 421243411 its reverse (114342124), we get a palindrome (535585535).

The spelling of 421243411 in words is "four hundred twenty-one million, two hundred forty-three thousand, four hundred eleven".