2001901 has 8 divisors (see below), whose sum is σ = 2202624. Its totient is φ = 1804320.

The previous prime is 2001847. The next prime is 2001911. The reversal of 2001901 is 1091002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001901 - 2¹¹ = 1999853 is a prime.

It is a super-2 number, since 2×2001901² = 8015215227602, which contains 22 as substring.

It is a Duffinian number.

2001901 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (275328).

2^2001901 is an apocalyptic number.

It is an amenable number.

2001901 is a deficient number, since it is larger than the sum of its proper divisors (200723).

2001901 is a wasteful number, since it uses less digits than its factorization.

2001901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 2001901 is about 1414.8855077355. The cubic root of 2001901 is about 126.0320108472.

Adding to 2001901 its reverse (1091002), we get a palindrome (3092903).

The spelling of 2001901 in words is "two million, one thousand, nine hundred one".