16860401 has 4 divisors (see below), whose sum is σ = 16889712. Its totient is φ = 16831092.

The previous prime is 16860367. The next prime is 16860409. The reversal of 16860401 is 10406861.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10406861 = 653 ⋅15937.

It is a cyclic number.

It is not a de Polignac number, because 16860401 - 2¹⁴ = 16844017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16860409) 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, 13775 + ... + 14948.

It is an arithmetic number, because the mean of its divisors is an integer number (4222428).

Almost surely, 2^16860401 is an apocalyptic number.

It is an amenable number.

16860401 is a deficient number, since it is larger than the sum of its proper divisors (29311).

16860401 is an equidigital number, since it uses as much as digits as its factorization.

16860401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29310.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 16860401 is about 4106.1418631119. The cubic root of 16860401 is about 256.4224034347.

The spelling of 16860401 in words is "sixteen million, eight hundred sixty thousand, four hundred one".