39861125 has 8 divisors (see below), whose sum is σ = 49746840. Its totient is φ = 31888800.

The previous prime is 39861097. The next prime is 39861149. The reversal of 39861125 is 52116893.

It can be written as a sum of positive squares in 4 ways, for example, as 1532644 + 38328481 = 1238^2 + 6191^2 .

It is not a de Polignac number, because 39861125 - 2²² = 35666821 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 159320 + ... + 159569.

It is an arithmetic number, because the mean of its divisors is an integer number (6218355).

Almost surely, 2^39861125 is an apocalyptic number.

It is an amenable number.

39861125 is a deficient number, since it is larger than the sum of its proper divisors (9885715).

39861125 is an equidigital number, since it uses as much as digits as its factorization.

39861125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318904 (or 318894 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 39861125 is about 6313.5667415495. The cubic root of 39861125 is about 341.5989422248.

The spelling of 39861125 in words is "thirty-nine million, eight hundred sixty-one thousand, one hundred twenty-five".