420451543 has 8 divisors (see below), whose sum is σ = 435438080. Its totient is φ = 405554040.

The previous prime is 420451469. The next prime is 420451553. The reversal of 420451543 is 345154024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420451543 - 2¹³ = 420443351 is a prime.

It is a super-2 number, since 2×420451543² = 353559000022161698, 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 (420451553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12573 + ... + 31606.

It is an arithmetic number, because the mean of its divisors is an integer number (54429760).

Almost surely, 2^420451543 is an apocalyptic number.

420451543 is a deficient number, since it is larger than the sum of its proper divisors (14986537).

420451543 is a wasteful number, since it uses less digits than its factorization.

420451543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44517.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 420451543 is about 20504.9150937038. The cubic root of 420451543 is about 749.1555194195.

The spelling of 420451543 in words is "four hundred twenty million, four hundred fifty-one thousand, five hundred forty-three".