420043503 has 16 divisors (see below), whose sum is σ = 637537536. Its totient is φ = 243503040.

The previous prime is 420043493. The next prime is 420043517. The reversal of 420043503 is 305340024.

It is a happy number.

It is not a de Polignac number, because 420043503 - 2¹⁰ = 420042479 is a prime.

It is a super-3 number, since 3×420043503³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 420043503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420043543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275950 + ... + 277467.

It is an arithmetic number, because the mean of its divisors is an integer number (39846096).

Almost surely, 2^420043503 is an apocalyptic number.

420043503 is a deficient number, since it is larger than the sum of its proper divisors (217494033).

420043503 is a wasteful number, since it uses less digits than its factorization.

420043503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553454.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 420043503 is about 20494.9628689588. The cubic root of 420043503 is about 748.9130940526.

Adding to 420043503 its reverse (305340024), we get a palindrome (725383527).

The spelling of 420043503 in words is "four hundred twenty million, forty-three thousand, five hundred three".