38542021 has 16 divisors (see below), whose sum is σ = 46448640. Its totient is φ = 31281840.

The previous prime is 38542001. The next prime is 38542039. The reversal of 38542021 is 12024583.

It is a cyclic number.

It is not a de Polignac number, because 38542021 - 2¹⁵ = 38509253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38542001) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8310 + ... + 12088.

It is an arithmetic number, because the mean of its divisors is an integer number (2903040).

Almost surely, 2^38542021 is an apocalyptic number.

38542021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

38542021 is a deficient number, since it is larger than the sum of its proper divisors (7906619).

38542021 is a wasteful number, since it uses less digits than its factorization.

38542021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3864.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 38542021 is about 6208.2220482196. Note that the first 3 decimals coincide. The cubic root of 38542021 is about 337.7884750775.

The spelling of 38542021 in words is "thirty-eight million, five hundred forty-two thousand, twenty-one".