421270543 has 4 divisors (see below), whose sum is σ = 421916328. Its totient is φ = 420624760.

The previous prime is 421270537. The next prime is 421270579. The reversal of 421270543 is 345072124.

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 421270543 - 2⁵ = 421270511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421270043) 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, 321913 + ... + 323218.

It is an arithmetic number, because the mean of its divisors is an integer number (105479082).

Almost surely, 2^421270543 is an apocalyptic number.

421270543 is a deficient number, since it is larger than the sum of its proper divisors (645785).

421270543 is an equidigital number, since it uses as much as digits as its factorization.

421270543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645784.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 421270543 is about 20524.8761993830. The cubic root of 421270543 is about 749.6416320497.

The spelling of 421270543 in words is "four hundred twenty-one million, two hundred seventy thousand, five hundred forty-three".