42403530 has 32 divisors (see below), whose sum is σ = 109597824. Its totient is φ = 10437696.

The previous prime is 42403519. The next prime is 42403531. The reversal of 42403530 is 3530424.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42403497 and 42403506.

It is not an unprimeable number, because it can be changed into a prime (42403531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53974 + ... + 54753.

It is an arithmetic number, because the mean of its divisors is an integer number (3424932).

Almost surely, 2^42403530 is an apocalyptic number.

42403530 is an abundant number, since it is smaller than the sum of its proper divisors (67194294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42403530 is a wasteful number, since it uses less digits than its factorization.

42403530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108750.

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

The square root of 42403530 is about 6511.7992905187. The cubic root of 42403530 is about 348.7123570321.

Adding to 42403530 its reverse (3530424), we get a palindrome (45933954).

The spelling of 42403530 in words is "forty-two million, four hundred three thousand, five hundred thirty".