4049749 has 6 divisors (see below), whose sum is σ = 4451510. Its totient is φ = 3681480.

The previous prime is 4049743. The next prime is 4049753. The reversal of 4049749 is 9479404.

It can be written as a sum of positive squares in only one way, i.e., 3175524 + 874225 = 1782^2 + 935^2 .

It is not a de Polignac number, because 4049749 - 2¹⁹ = 3525461 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 (4049743) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16614 + ... + 16855.

Almost surely, 2^4049749 is an apocalyptic number.

It is an amenable number.

4049749 is a deficient number, since it is larger than the sum of its proper divisors (401761).

4049749 is a wasteful number, since it uses less digits than its factorization.

4049749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33491 (or 33480 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 4049749 is about 2012.3988173322. The cubic root of 4049749 is about 159.3954923797.

It can be divided in two parts, 404 and 9749, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 4049749 in words is "four million, forty-nine thousand, seven hundred forty-nine".