42521303 has 8 divisors (see below), whose sum is σ = 46847376. Its totient is φ = 38272000.

The previous prime is 42521299. The next prime is 42521329. The reversal of 42521303 is 30312524.

It is a happy number.

42521303 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42521303 - 2² = 42521299 is a prime.

It is a super-2 number, since 2×42521303² = 3616122417635618, 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 (42521383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18026 + ... + 20247.

It is an arithmetic number, because the mean of its divisors is an integer number (5855922).

Almost surely, 2^42521303 is an apocalyptic number.

42521303 is a deficient number, since it is larger than the sum of its proper divisors (4326073).

42521303 is a wasteful number, since it uses less digits than its factorization.

42521303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38385.

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

The square root of 42521303 is about 6520.8360660271. The cubic root of 42521303 is about 349.0349004378.

Adding to 42521303 its reverse (30312524), we get a palindrome (72833827).

It can be divided in two parts, 42521 and 303, that added together give a palindrome (42824).

The spelling of 42521303 in words is "forty-two million, five hundred twenty-one thousand, three hundred three".