39521642 has 16 divisors (see below), whose sum is σ = 60746112. Its totient is φ = 19275840.

The previous prime is 39521641. The next prime is 39521701. The reversal of 39521642 is 24612593.

It is a happy number.

39521642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 39521599 and 39521608.

It is not an unprimeable number, because it can be changed into a prime (39521641) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 40217 + ... + 41187.

It is an arithmetic number, because the mean of its divisors is an integer number (3796632).

Almost surely, 2^39521642 is an apocalyptic number.

39521642 is a deficient number, since it is larger than the sum of its proper divisors (21224470).

39521642 is a wasteful number, since it uses less digits than its factorization.

39521642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453.

The product of its digits is 12960, while the sum is 32.

The square root of 39521642 is about 6286.6240542918. The cubic root of 39521642 is about 340.6264172654.

The spelling of 39521642 in words is "thirty-nine million, five hundred twenty-one thousand, six hundred forty-two".