42656503 has 4 divisors (see below), whose sum is σ = 42686568. Its totient is φ = 42626440.

The previous prime is 42656491. The next prime is 42656521. The reversal of 42656503 is 30565624.

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 42656503 - 2¹³ = 42648311 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 (42656533) 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, 12793 + ... + 15778.

It is an arithmetic number, because the mean of its divisors is an integer number (10671642).

Almost surely, 2^42656503 is an apocalyptic number.

42656503 is a deficient number, since it is larger than the sum of its proper divisors (30065).

42656503 is a wasteful number, since it uses less digits than its factorization.

42656503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30064.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 42656503 is about 6531.1946074206. The cubic root of 42656503 is about 349.4044375015.

The spelling of 42656503 in words is "forty-two million, six hundred fifty-six thousand, five hundred three".