4049681 has 4 divisors (see below), whose sum is σ = 4110192. Its totient is φ = 3989172.

The previous prime is 4049609. The next prime is 4049707. The reversal of 4049681 is 1869404.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4049681 is a prime.

It is a super-2 number, since 2×4049681² = 32799832403522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4043681) 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, 30155 + ... + 30288.

It is an arithmetic number, because the mean of its divisors is an integer number (1027548).

Almost surely, 2^4049681 is an apocalyptic number.

It is an amenable number.

4049681 is a deficient number, since it is larger than the sum of its proper divisors (60511).

4049681 is an equidigital number, since it uses as much as digits as its factorization.

4049681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60510.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 4049681 is about 2012.3819220019. The cubic root of 4049681 is about 159.3946002294.

The spelling of 4049681 in words is "four million, forty-nine thousand, six hundred eighty-one".