4078001 has 4 divisors (see below), whose sum is σ = 4096512. Its totient is φ = 4059492.

The previous prime is 4077971. The next prime is 4078003. The reversal of 4078001 is 1008704.

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.

It is a de Polignac number, because none of the positive numbers 2^k-4078001 is a prime.

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 (4078003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8921 + ... + 9366.

It is an arithmetic number, because the mean of its divisors is an integer number (1024128).

Almost surely, 2^4078001 is an apocalyptic number.

It is an amenable number.

4078001 is a deficient number, since it is larger than the sum of its proper divisors (18511).

4078001 is a wasteful number, since it uses less digits than its factorization.

4078001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18510.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 4078001 is about 2019.4061008128. The cubic root of 4078001 is about 159.7652938957.

The spelling of 4078001 in words is "four million, seventy-eight thousand, one".