16001901 has 8 divisors (see below), whose sum is σ = 23706560. Its totient is φ = 10667916.

The previous prime is 16001899. The next prime is 16001903. The reversal of 16001901 is 10910061.

It is an interprime number because it is at equal distance from previous prime (16001899) and next prime (16001903).

It is not a de Polignac number, because 16001901 - 2¹ = 16001899 is a prime.

It is a super-2 number, since 2×16001901² = 512121671227602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16001903) 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, 296305 + ... + 296358.

It is an arithmetic number, because the mean of its divisors is an integer number (2963320).

Almost surely, 2^16001901 is an apocalyptic number.

It is an amenable number.

16001901 is a deficient number, since it is larger than the sum of its proper divisors (7704659).

16001901 is an equidigital number, since it uses as much as digits as its factorization.

16001901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592672 (or 592666 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 16001901 is about 4000.2376179422. The cubic root of 16001901 is about 251.9941892084.

Adding to 16001901 its reverse (10910061), we get a palindrome (26911962).

The spelling of 16001901 in words is "sixteen million, one thousand, nine hundred one".