39821825 has 12 divisors (see below), whose sum is σ = 50972928. Its totient is φ = 30829200.

The previous prime is 39821813. The next prime is 39821833. The reversal of 39821825 is 52812893.

It is not a de Polignac number, because 39821825 - 2¹⁶ = 39756289 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 24917 + ... + 26466.

It is an arithmetic number, because the mean of its divisors is an integer number (4247744).

Almost surely, 2^39821825 is an apocalyptic number.

It is an amenable number.

39821825 is a deficient number, since it is larger than the sum of its proper divisors (11151103).

39821825 is a wasteful number, since it uses less digits than its factorization.

39821825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51424 (or 51419 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 39821825 is about 6310.4536287021. The cubic root of 39821825 is about 341.4866418921.

The spelling of 39821825 in words is "thirty-nine million, eight hundred twenty-one thousand, eight hundred twenty-five".