4000049 has 6 divisors (see below), whose sum is σ = 4249494. Its totient is φ = 3764480.

The previous prime is 4000043. The next prime is 4000063. The reversal of 4000049 is 9400004.

It can be written as a sum of positive squares in 3 ways, for example, as 1254400 + 2745649 = 1120^2 + 1657^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4000049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000043) 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, 6632 + ... + 7209.

It is an arithmetic number, because the mean of its divisors is an integer number (708249).

Almost surely, 2^4000049 is an apocalyptic number.

It is an amenable number.

4000049 is a deficient number, since it is larger than the sum of its proper divisors (249445).

4000049 is a wasteful number, since it uses less digits than its factorization.

4000049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13875 (or 13858 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 4000049 is about 2000.0122499625. The cubic root of 4000049 is about 158.7407533829.

It can be divided in two parts, 40000 and 49, that multiplied together give a square (1960000 = 1400²).

The spelling of 4000049 in words is "four million, forty-nine", and thus it is an aban number.