42503745 has 16 divisors (see below), whose sum is σ = 69454080. Its totient is φ = 22185984.

The previous prime is 42503633. The next prime is 42503749. The reversal of 42503745 is 54730524.

It is not a de Polignac number, because 42503745 - 2⁹ = 42503233 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42503749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29440 + ... + 30849.

It is an arithmetic number, because the mean of its divisors is an integer number (4340880).

Almost surely, 2^42503745 is an apocalyptic number.

It is an amenable number.

42503745 is a deficient number, since it is larger than the sum of its proper divisors (26950335).

42503745 is a wasteful number, since it uses less digits than its factorization.

42503745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60344.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 42503745 is about 6519.4896272638. The cubic root of 42503745 is about 348.9868523767.

The spelling of 42503745 in words is "forty-two million, five hundred three thousand, seven hundred forty-five".