420252543 has 20 divisors (see below), whose sum is σ = 649436040. Its totient is φ = 270505872.

The previous prime is 420252533. The next prime is 420252559. The reversal of 420252543 is 345252024.

It is a happy number.

It is not a de Polignac number, because 420252543 - 2¹² = 420248447 is a prime.

It is a super-2 number, since 2×420252543² = 353224399795933698, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420252533) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 87105 + ... + 91802.

It is an arithmetic number, because the mean of its divisors is an integer number (32471802).

Almost surely, 2^420252543 is an apocalyptic number.

420252543 is a deficient number, since it is larger than the sum of its proper divisors (229183497).

420252543 is a wasteful number, since it uses less digits than its factorization.

420252543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178948 (or 178939 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 420252543 is about 20500.0620242964. The cubic root of 420252543 is about 749.0373088297.

The spelling of 420252543 in words is "four hundred twenty million, two hundred fifty-two thousand, five hundred forty-three".