4001025001 has 4 divisors (see below), whose sum is σ = 4001356432. Its totient is φ = 4000693572.

The previous prime is 4001024983. The next prime is 4001025011. The reversal of 4001025001 is 1005201004.

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 not a de Polignac number, because 4001025001 - 2¹¹ = 4001022953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001025011) 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, 146895 + ... + 171988.

It is an arithmetic number, because the mean of its divisors is an integer number (1000339108).

Almost surely, 2^4001025001 is an apocalyptic number.

It is an amenable number.

4001025001 is a deficient number, since it is larger than the sum of its proper divisors (331431).

4001025001 is a wasteful number, since it uses less digits than its factorization.

4001025001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331430.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 4001025001 is about 63253.6560287230. The cubic root of 4001025001 is about 1587.5366310269.

Adding to 4001025001 its reverse (1005201004), we get a palindrome (5006226005).

The spelling of 4001025001 in words is "four billion, one million, twenty-five thousand, one".