39228121 has 4 divisors (see below), whose sum is σ = 39305700. Its totient is φ = 39150544.

The previous prime is 39228107. The next prime is 39228131. The reversal of 39228121 is 12182293.

39228121 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 an emirpimes, since its reverse is a distinct semiprime: 12182293 = 1447 ⋅8419.

It can be written as a sum of positive squares in 2 ways, for example, as 34339600 + 4888521 = 5860^2 + 2211^2 .

It is a cyclic number.

It is not a de Polignac number, because 39228121 - 2⁵ = 39228089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39228121.

It is not an unprimeable number, because it can be changed into a prime (39228131) 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, 38026 + ... + 39043.

It is an arithmetic number, because the mean of its divisors is an integer number (9826425).

Almost surely, 2^39228121 is an apocalyptic number.

It is an amenable number.

39228121 is a deficient number, since it is larger than the sum of its proper divisors (77579).

39228121 is an equidigital number, since it uses as much as digits as its factorization.

39228121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77578.

The product of its digits is 1728, while the sum is 28.

The square root of 39228121 is about 6263.2356653730. The cubic root of 39228121 is about 339.7810614698.

The spelling of 39228121 in words is "thirty-nine million, two hundred twenty-eight thousand, one hundred twenty-one".