39121287 has 16 divisors (see below), whose sum is σ = 54054912. Its totient is φ = 25140960.

The previous prime is 39121279. The next prime is 39121297. The reversal of 39121287 is 78212193.

39121287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39121287 - 2³ = 39121279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39121217) 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 15 ways as a sum of consecutive naturals, for example, 28818 + ... + 30144.

It is an arithmetic number, because the mean of its divisors is an integer number (3378432).

Almost surely, 2^39121287 is an apocalyptic number.

39121287 is a deficient number, since it is larger than the sum of its proper divisors (14933625).

39121287 is a wasteful number, since it uses less digits than its factorization.

39121287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678.

The product of its digits is 6048, while the sum is 33.

The square root of 39121287 is about 6254.7011919036. The cubic root of 39121287 is about 339.4723273927.

The spelling of 39121287 in words is "thirty-nine million, one hundred twenty-one thousand, two hundred eighty-seven".