42503920 has 20 divisors (see below), whose sum is σ = 98821800. Its totient is φ = 17001536.

The previous prime is 42503897. The next prime is 42503939. The reversal of 42503920 is 2930524.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265570 + ... + 265729.

It is an arithmetic number, because the mean of its divisors is an integer number (4941090).

Almost surely, 2^42503920 is an apocalyptic number.

42503920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42503920 is an abundant number, since it is smaller than the sum of its proper divisors (56317880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42503920 is a wasteful number, since it uses less digits than its factorization.

42503920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531312 (or 531306 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 42503920 is about 6519.5030485460. The cubic root of 42503920 is about 348.9873313354.

The spelling of 42503920 in words is "forty-two million, five hundred three thousand, nine hundred twenty".