421154543 has 4 divisors (see below), whose sum is σ = 421437000. Its totient is φ = 420872088.

The previous prime is 421154519. The next prime is 421154579. The reversal of 421154543 is 345451124.

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 421154543 - 2⁸ = 421154287 is a prime.

It is a super-2 number, since 2×421154543² = 354742298179077698, 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 (421144543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138980 + ... + 141977.

It is an arithmetic number, because the mean of its divisors is an integer number (105359250).

Almost surely, 2^421154543 is an apocalyptic number.

421154543 is a deficient number, since it is larger than the sum of its proper divisors (282457).

421154543 is a wasteful number, since it uses less digits than its factorization.

421154543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282456.

The product of its digits is 9600, while the sum is 29.

The square root of 421154543 is about 20522.0501656145. The cubic root of 421154543 is about 749.5728192535.

The spelling of 421154543 in words is "four hundred twenty-one million, one hundred fifty-four thousand, five hundred forty-three".