16172001 has 8 divisors (see below), whose sum is σ = 23958560. Its totient is φ = 10781316.

The previous prime is 16171973. The next prime is 16172017. The reversal of 16172001 is 10027161.

It is not a de Polignac number, because 16172001 - 2¹⁰ = 16170977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16172041) 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, 299455 + ... + 299508.

It is an arithmetic number, because the mean of its divisors is an integer number (2994820).

Almost surely, 2^16172001 is an apocalyptic number.

It is an amenable number.

16172001 is a deficient number, since it is larger than the sum of its proper divisors (7786559).

16172001 is an equidigital number, since it uses as much as digits as its factorization.

16172001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598972 (or 598966 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 16172001 is about 4021.4426515866. The cubic root of 16172001 is about 252.8839422492.

Adding to 16172001 its reverse (10027161), we get a palindrome (26199162).

The spelling of 16172001 in words is "sixteen million, one hundred seventy-two thousand, one".