16040001 has 8 divisors (see below), whose sum is σ = 21706144. Its totient is φ = 10533600.

The previous prime is 16039963. The next prime is 16040053. The reversal of 16040001 is 10004061.

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

It is not a de Polignac number, because 16040001 - 2⁷ = 16039873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16041001) 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, 39700 + ... + 40101.

It is an arithmetic number, because the mean of its divisors is an integer number (2713268).

Almost surely, 2^16040001 is an apocalyptic number.

It is an amenable number.

16040001 is a deficient number, since it is larger than the sum of its proper divisors (5666143).

16040001 is an equidigital number, since it uses as much as digits as its factorization.

16040001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79871.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 16040001 is about 4004.9970037442. The cubic root of 16040001 is about 252.1940273152.

Adding to 16040001 its product of nonzero digits (24), we get a square (16040025 = 4005²).

Adding to 16040001 its reverse (10004061), we get a palindrome (26044062).

The spelling of 16040001 in words is "sixteen million, forty thousand, one".