421345511 has 4 divisors (see below), whose sum is σ = 421631112. Its totient is φ = 421059912.

The previous prime is 421345471. The next prime is 421345517. The reversal of 421345511 is 115543124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421345511 - 2⁶ = 421345447 is a prime.

It is a super-2 number, since 2×421345511² = 355064079279702242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421345517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140576 + ... + 143541.

It is an arithmetic number, because the mean of its divisors is an integer number (105407778).

Almost surely, 2^421345511 is an apocalyptic number.

421345511 is a deficient number, since it is larger than the sum of its proper divisors (285601).

421345511 is a wasteful number, since it uses less digits than its factorization.

421345511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285600.

The product of its digits is 2400, while the sum is 26.

The square root of 421345511 is about 20526.7023898141. The cubic root of 421345511 is about 749.6860973793.

Adding to 421345511 its reverse (115543124), we get a palindrome (536888635).

The spelling of 421345511 in words is "four hundred twenty-one million, three hundred forty-five thousand, five hundred eleven".