39852521 has 4 divisors (see below), whose sum is σ = 39887952. Its totient is φ = 39817092.

The previous prime is 39852511. The next prime is 39852541. The reversal of 39852521 is 12525893.

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: 12525893 = 193 ⋅64901.

It is a cyclic number.

It is not a de Polignac number, because 39852521 - 2⁶ = 39852457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39852511) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 15971 + ... + 18296.

It is an arithmetic number, because the mean of its divisors is an integer number (9971988).

Almost surely, 2^39852521 is an apocalyptic number.

It is an amenable number.

39852521 is a deficient number, since it is larger than the sum of its proper divisors (35431).

39852521 is a wasteful number, since it uses less digits than its factorization.

39852521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35430.

The product of its digits is 21600, while the sum is 35.

The square root of 39852521 is about 6312.8853149729. The cubic root of 39852521 is about 341.5743624804.

The spelling of 39852521 in words is "thirty-nine million, eight hundred fifty-two thousand, five hundred twenty-one".