42510403 has 4 divisors (see below), whose sum is σ = 45780448. Its totient is φ = 39240360.

The previous prime is 42510397. The next prime is 42510407. The reversal of 42510403 is 30401524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42510403 - 2²⁵ = 8955971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42510407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1635003 + ... + 1635028.

It is an arithmetic number, because the mean of its divisors is an integer number (11445112).

Almost surely, 2^42510403 is an apocalyptic number.

42510403 is a deficient number, since it is larger than the sum of its proper divisors (3270045).

42510403 is a wasteful number, since it uses less digits than its factorization.

42510403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3270044.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42510403 is about 6520.0002300613. Note that the first 3 decimals coincide. The cubic root of 42510403 is about 349.0050737762.

Adding to 42510403 its reverse (30401524), we get a palindrome (72911927).

The spelling of 42510403 in words is "forty-two million, five hundred ten thousand, four hundred three".