42115503 has 4 divisors (see below), whose sum is σ = 56154008. Its totient is φ = 28077000.

The previous prime is 42115501. The next prime is 42115517. The reversal of 42115503 is 30551124.

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

It is not a de Polignac number, because 42115503 - 2¹ = 42115501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42115503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42115501) 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, 7019248 + ... + 7019253.

It is an arithmetic number, because the mean of its divisors is an integer number (14038502).

Almost surely, 2^42115503 is an apocalyptic number.

42115503 is a deficient number, since it is larger than the sum of its proper divisors (14038505).

42115503 is a wasteful number, since it uses less digits than its factorization.

42115503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14038504.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 42115503 is about 6489.6458300897. The cubic root of 42115503 is about 347.9210168882.

Adding to 42115503 its reverse (30551124), we get a palindrome (72666627).

The spelling of 42115503 in words is "forty-two million, one hundred fifteen thousand, five hundred three".