16406101 has 4 divisors (see below), whose sum is σ = 17269600. Its totient is φ = 15542604.

The previous prime is 16406087. The next prime is 16406111. The reversal of 16406101 is 10160461.

It is a happy number.

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: 10160461 = 563 ⋅18047.

It is a cyclic number.

It is not a de Polignac number, because 16406101 - 2¹⁵ = 16373333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 863479 = 16406101 / (1 + 6 + 4 + 0 + 6 + 1 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16406111) 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, 431721 + ... + 431758.

It is an arithmetic number, because the mean of its divisors is an integer number (4317400).

Almost surely, 2^16406101 is an apocalyptic number.

It is an amenable number.

16406101 is a deficient number, since it is larger than the sum of its proper divisors (863499).

16406101 is an equidigital number, since it uses as much as digits as its factorization.

16406101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863498.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 16406101 is about 4050.4445435038. Note that the first 3 decimals coincide. The cubic root of 16406101 is about 254.0983199668.

Adding to 16406101 its reverse (10160461), we get a palindrome (26566562).

The spelling of 16406101 in words is "sixteen million, four hundred six thousand, one hundred one".