4078641 has 16 divisors (see below), whose sum is σ = 6257664. Its totient is φ = 2314704.

The previous prime is 4078637. The next prime is 4078649. The reversal of 4078641 is 1468704.

It is not a de Polignac number, because 4078641 - 2² = 4078637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4078599 and 4078608.

It is not an unprimeable number, because it can be changed into a prime (4078649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2926 + ... + 4088.

It is an arithmetic number, because the mean of its divisors is an integer number (391104).

Almost surely, 2^4078641 is an apocalyptic number.

It is an amenable number.

4078641 is a deficient number, since it is larger than the sum of its proper divisors (2179023).

4078641 is a wasteful number, since it uses less digits than its factorization.

4078641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 4078641 is about 2019.5645570271. The cubic root of 4078641 is about 159.7736512943.

The spelling of 4078641 in words is "four million, seventy-eight thousand, six hundred forty-one".