42503365 has 4 divisors (see below), whose sum is σ = 51004044. Its totient is φ = 34002688.

The previous prime is 42503359. The next prime is 42503381. The reversal of 42503365 is 56330524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5997601 + 36505764 = 2449^2 + 6042^2 .

It is a cyclic number.

It is not a de Polignac number, because 42503365 - 2⁹ = 42502853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4250332 + ... + 4250341.

It is an arithmetic number, because the mean of its divisors is an integer number (12751011).

Almost surely, 2^42503365 is an apocalyptic number.

It is an amenable number.

42503365 is a deficient number, since it is larger than the sum of its proper divisors (8500679).

42503365 is an equidigital number, since it uses as much as digits as its factorization.

42503365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500678.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 42503365 is about 6519.4604838131. The cubic root of 42503365 is about 348.9858123476.

Adding to 42503365 its reverse (56330524), we get a palindrome (98833889).

The spelling of 42503365 in words is "forty-two million, five hundred three thousand, three hundred sixty-five".