39541921 has 4 divisors (see below), whose sum is σ = 39558832. Its totient is φ = 39525012.

The previous prime is 39541919. The next prime is 39541933. The reversal of 39541921 is 12914593.

39541921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12914593 = 569 ⋅22697.

It is a cyclic number.

It is not a de Polignac number, because 39541921 - 2¹ = 39541919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39541961) 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 3 ways as a sum of consecutive naturals, for example, 4251 + ... + 9856.

It is an arithmetic number, because the mean of its divisors is an integer number (9889708).

Almost surely, 2^39541921 is an apocalyptic number.

It is an amenable number.

39541921 is a deficient number, since it is larger than the sum of its proper divisors (16911).

39541921 is a wasteful number, since it uses less digits than its factorization.

39541921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16910.

The product of its digits is 9720, while the sum is 34.

The square root of 39541921 is about 6288.2367162822. The cubic root of 39541921 is about 340.6846670551.

The spelling of 39541921 in words is "thirty-nine million, five hundred forty-one thousand, nine hundred twenty-one".