4129949 has 4 divisors (see below), whose sum is σ = 4309536. Its totient is φ = 3950364.

The previous prime is 4129943. The next prime is 4129981. The reversal of 4129949 is 9499214.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9499214 = 2 ⋅4749607.

It is a cyclic number.

It is not a de Polignac number, because 4129949 - 2⁴ = 4129933 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 (4129943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89759 + ... + 89804.

It is an arithmetic number, because the mean of its divisors is an integer number (1077384).

Almost surely, 2^4129949 is an apocalyptic number.

It is an amenable number.

4129949 is a deficient number, since it is larger than the sum of its proper divisors (179587).

4129949 is a wasteful number, since it uses less digits than its factorization.

4129949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179586.

The product of its digits is 23328, while the sum is 38.

The square root of 4129949 is about 2032.2275955217. The cubic root of 4129949 is about 160.4408285938.

The spelling of 4129949 in words is "four million, one hundred twenty-nine thousand, nine hundred forty-nine".