39249221 has 8 divisors (see below), whose sum is σ = 42894144. Its totient is φ = 35617120.

The previous prime is 39249191. The next prime is 39249229. The reversal of 39249221 is 12294293.

39249221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-39249221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39249229) 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 7 ways as a sum of consecutive naturals, for example, 3896 + ... + 9678.

It is an arithmetic number, because the mean of its divisors is an integer number (5361768).

Almost surely, 2^39249221 is an apocalyptic number.

It is an amenable number.

39249221 is a deficient number, since it is larger than the sum of its proper divisors (3644923).

39249221 is a wasteful number, since it uses less digits than its factorization.

39249221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6411.

The product of its digits is 7776, while the sum is 32.

The square root of 39249221 is about 6264.9198717941. The cubic root of 39249221 is about 339.8419709669.

The spelling of 39249221 in words is "thirty-nine million, two hundred forty-nine thousand, two hundred twenty-one".