42321503 has 8 divisors (see below), whose sum is σ = 49492608. Its totient is φ = 35431704.

The previous prime is 42321491. The next prime is 42321511. The reversal of 42321503 is 30512324.

It is a happy number.

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

It is not a de Polignac number, because 42321503 - 2⁶ = 42321439 is a prime.

It is a super-3 number, since 3×42321503³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42321563) 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, 70001 + ... + 70602.

It is an arithmetic number, because the mean of its divisors is an integer number (6186576).

Almost surely, 2^42321503 is an apocalyptic number.

42321503 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

42321503 is a deficient number, since it is larger than the sum of its proper divisors (7171105).

42321503 is a wasteful number, since it uses less digits than its factorization.

42321503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140653.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 42321503 is about 6505.4979056180. The cubic root of 42321503 is about 348.4873577418.

Adding to 42321503 its reverse (30512324), we get a palindrome (72833827).

It can be divided in two parts, 42321 and 503, that added together give a palindrome (42824).

The spelling of 42321503 in words is "forty-two million, three hundred twenty-one thousand, five hundred three".