42121503 has 12 divisors (see below), whose sum is σ = 62487048. Its totient is φ = 27321840.

The previous prime is 42121501. The next prime is 42121549. The reversal of 42121503 is 30512124.

42121503 is a `hidden beast` number, since 42 + 121 + 503 = 666.

42121503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42121503 - 2¹ = 42121501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62913 + ... + 63578.

It is an arithmetic number, because the mean of its divisors is an integer number (5207254).

Almost surely, 2^42121503 is an apocalyptic number.

42121503 is a deficient number, since it is larger than the sum of its proper divisors (20365545).

42121503 is a wasteful number, since it uses less digits than its factorization.

42121503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126534 (or 126531 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 42121503 is about 6490.1080884682. The cubic root of 42121503 is about 347.9375383338.

Adding to 42121503 its reverse (30512124), we get a palindrome (72633627).

It can be divided in two parts, 42121 and 503, that added together give a palindrome (42624).

The spelling of 42121503 in words is "forty-two million, one hundred twenty-one thousand, five hundred three".