42503455 has 4 divisors (see below), whose sum is σ = 51004152. Its totient is φ = 34002760.

The previous prime is 42503453. The next prime is 42503477. The reversal of 42503455 is 55430524.

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

It is not a de Polignac number, because 42503455 - 2¹ = 42503453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42503453) 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, 4250341 + ... + 4250350.

It is an arithmetic number, because the mean of its divisors is an integer number (12751038).

Almost surely, 2^42503455 is an apocalyptic number.

42503455 is a deficient number, since it is larger than the sum of its proper divisors (8500697).

42503455 is an equidigital number, since it uses as much as digits as its factorization.

42503455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500696.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 42503455 is about 6519.4673862211. The cubic root of 42503455 is about 348.9860586709.

Adding to 42503455 its reverse (55430524), we get a palindrome (97933979).

The spelling of 42503455 in words is "forty-two million, five hundred three thousand, four hundred fifty-five".