42821452 has 12 divisors (see below), whose sum is σ = 75477640. Its totient is φ = 21256416.

The previous prime is 42821407. The next prime is 42821461. The reversal of 42821452 is 25412824.

42821452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 42821452.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 37953 + ... + 39064.

Almost surely, 2^42821452 is an apocalyptic number.

It is an amenable number.

42821452 is a deficient number, since it is larger than the sum of its proper divisors (32656188).

42821452 is a wasteful number, since it uses less digits than its factorization.

42821452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77160 (or 77158 counting only the distinct ones).

The product of its digits is 5120, while the sum is 28.

The square root of 42821452 is about 6543.8102050717. The cubic root of 42821452 is about 349.8542304541.

The spelling of 42821452 in words is "forty-two million, eight hundred twenty-one thousand, four hundred fifty-two".