4005901 has 2 divisors, whose sum is σ = 4005902. Its totient is φ = 4005900.

The previous prime is 4005893. The next prime is 4005917. The reversal of 4005901 is 1095004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3802500 + 203401 = 1950^2 + 451^2 .

It is a cyclic number.

It is not a de Polignac number, because 4005901 - 2³ = 4005893 is a prime.

4005901 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4005971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2002950 + 2002951.

It is an arithmetic number, because the mean of its divisors is an integer number (2002951).

Almost surely, 2^4005901 is an apocalyptic number.

It is an amenable number.

4005901 is a deficient number, since it is larger than the sum of its proper divisors (1).

4005901 is an equidigital number, since it uses as much as digits as its factorization.

4005901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 4005901 is about 2001.4747063103. The cubic root of 4005901 is about 158.8181272888.

The spelling of 4005901 in words is "four million, five thousand, nine hundred one".