42156503 has 4 divisors (see below), whose sum is σ = 42871080. Its totient is φ = 41441928.

The previous prime is 42156473. The next prime is 42156511. The reversal of 42156503 is 30565124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42156503 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 (42156523) 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, 357200 + ... + 357317.

It is an arithmetic number, because the mean of its divisors is an integer number (10717770).

Almost surely, 2^42156503 is an apocalyptic number.

42156503 is a deficient number, since it is larger than the sum of its proper divisors (714577).

42156503 is an equidigital number, since it uses as much as digits as its factorization.

42156503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714576.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 42156503 is about 6492.8039397474. The cubic root of 42156503 is about 348.0338821769.

The spelling of 42156503 in words is "forty-two million, one hundred fifty-six thousand, five hundred three".