421543454 has 4 divisors (see below), whose sum is σ = 632315184. Its totient is φ = 210771726.

The previous prime is 421543453. The next prime is 421543469. The reversal of 421543454 is 454345124.

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

It is a super-2 number, since 2×421543454² = 355397767220500232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421543454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421543453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105385862 + ... + 105385865.

It is an arithmetic number, because the mean of its divisors is an integer number (158078796).

Almost surely, 2^421543454 is an apocalyptic number.

421543454 is a deficient number, since it is larger than the sum of its proper divisors (210771730).

421543454 is a wasteful number, since it uses less digits than its factorization.

421543454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210771729.

The product of its digits is 38400, while the sum is 32.

The square root of 421543454 is about 20531.5234213148. The cubic root of 421543454 is about 749.8034768056.

Adding to 421543454 its reverse (454345124), we get a palindrome (875888578).

The spelling of 421543454 in words is "four hundred twenty-one million, five hundred forty-three thousand, four hundred fifty-four".