42145503 has 4 divisors (see below), whose sum is σ = 56194008. Its totient is φ = 28097000.

The previous prime is 42145489. The next prime is 42145507. The reversal of 42145503 is 30554124.

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 42145503 - 2⁵ = 42145471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42145507) 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, 7024248 + ... + 7024253.

It is an arithmetic number, because the mean of its divisors is an integer number (14048502).

Almost surely, 2^42145503 is an apocalyptic number.

42145503 is a deficient number, since it is larger than the sum of its proper divisors (14048505).

42145503 is a wasteful number, since it uses less digits than its factorization.

42145503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14048504.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 42145503 is about 6491.9567928322. The cubic root of 42145503 is about 348.0036084313.

Adding to 42145503 its reverse (30554124), we get a palindrome (72699627).

The spelling of 42145503 in words is "forty-two million, one hundred forty-five thousand, five hundred three".