4138749 has 8 divisors (see below), whose sum is σ = 6131520. Its totient is φ = 2759148.

The previous prime is 4138747. The next prime is 4138753. The reversal of 4138749 is 9478314.

It is a happy number.

It is not a de Polignac number, because 4138749 - 2¹ = 4138747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4138741) 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, 76617 + ... + 76670.

It is an arithmetic number, because the mean of its divisors is an integer number (766440).

Almost surely, 2^4138749 is an apocalyptic number.

It is an amenable number.

4138749 is a deficient number, since it is larger than the sum of its proper divisors (1992771).

4138749 is a wasteful number, since it uses less digits than its factorization.

4138749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153296 (or 153290 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 4138749 is about 2034.3915552322. The cubic root of 4138749 is about 160.5547022903.

The spelling of 4138749 in words is "four million, one hundred thirty-eight thousand, seven hundred forty-nine".