42403505 has 16 divisors (see below), whose sum is σ = 52752384. Its totient is φ = 32687040.

The previous prime is 42403499. The next prime is 42403519. The reversal of 42403505 is 50530424.

It is not a de Polignac number, because 42403505 - 2⁶ = 42403441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 48704 + ... + 49566.

It is an arithmetic number, because the mean of its divisors is an integer number (3297024).

Almost surely, 2^42403505 is an apocalyptic number.

It is an amenable number.

42403505 is a deficient number, since it is larger than the sum of its proper divisors (10348879).

42403505 is a wasteful number, since it uses less digits than its factorization.

42403505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 42403505 is about 6511.7973709261. The cubic root of 42403505 is about 348.7122885016.

Adding to 42403505 its reverse (50530424), we get a palindrome (92933929).

The spelling of 42403505 in words is "forty-two million, four hundred three thousand, five hundred five".