4138985 has 8 divisors (see below), whose sum is σ = 4987656. Its totient is φ = 3297280.

The previous prime is 4138969. The next prime is 4138987. The reversal of 4138985 is 5898314.

It can be written as a sum of positive squares in 4 ways, for example, as 2111209 + 2027776 = 1453^2 + 1424^2 .

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

It is not a de Polignac number, because 4138985 - 2⁴ = 4138969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4138987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326 + ... + 2895.

It is an arithmetic number, because the mean of its divisors is an integer number (623457).

Almost surely, 2^4138985 is an apocalyptic number.

It is an amenable number.

4138985 is a deficient number, since it is larger than the sum of its proper divisors (848671).

4138985 is a wasteful number, since it uses less digits than its factorization.

4138985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483.

The product of its digits is 34560, while the sum is 38.

The square root of 4138985 is about 2034.4495570055. The cubic root of 4138985 is about 160.5577539524.

The spelling of 4138985 in words is "four million, one hundred thirty-eight thousand, nine hundred eighty-five".