39066521 has 4 divisors (see below), whose sum is σ = 42071652. Its totient is φ = 36061392.

The previous prime is 39066491. The next prime is 39066529. The reversal of 39066521 is 12566093.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12566093 = 433 ⋅29021.

It can be written as a sum of positive squares in 2 ways, for example, as 9211225 + 29855296 = 3035^2 + 5464^2 .

It is a cyclic number.

It is not a de Polignac number, because 39066521 - 2²² = 34872217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39066529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1502546 + ... + 1502571.

It is an arithmetic number, because the mean of its divisors is an integer number (10517913).

Almost surely, 2^39066521 is an apocalyptic number.

It is an amenable number.

39066521 is a deficient number, since it is larger than the sum of its proper divisors (3005131).

39066521 is a wasteful number, since it uses less digits than its factorization.

39066521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005130.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 39066521 is about 6250.3216717222. The cubic root of 39066521 is about 339.3138439930.

The spelling of 39066521 in words is "thirty-nine million, sixty-six thousand, five hundred twenty-one".