39052021 has 4 divisors (see below), whose sum is σ = 39137932. Its totient is φ = 38966112.

The previous prime is 39052001. The next prime is 39052031. The reversal of 39052021 is 12025093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12025093 = 67 ⋅179479.

It can be written as a sum of positive squares in 2 ways, for example, as 31516996 + 7535025 = 5614^2 + 2745^2 .

It is a cyclic number.

It is not a de Polignac number, because 39052021 - 2⁵ = 39051989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39051983 and 39052001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39052001) 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, 42270 + ... + 43183.

It is an arithmetic number, because the mean of its divisors is an integer number (9784483).

Almost surely, 2^39052021 is an apocalyptic number.

It is an amenable number.

39052021 is a deficient number, since it is larger than the sum of its proper divisors (85911).

39052021 is an equidigital number, since it uses as much as digits as its factorization.

39052021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85910.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 39052021 is about 6249.1616237700. The cubic root of 39052021 is about 339.2718586865.

The spelling of 39052021 in words is "thirty-nine million, fifty-two thousand, twenty-one".