16459861 has 8 divisors (see below), whose sum is σ = 18021024. Its totient is φ = 14909520.

The previous prime is 16459799. The next prime is 16459873. The reversal of 16459861 is 16895461.

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

It is a cyclic number.

It is not a de Polignac number, because 16459861 - 2¹⁵ = 16427093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16459361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670 + ... + 5776.

It is an arithmetic number, because the mean of its divisors is an integer number (2252628).

Almost surely, 2^16459861 is an apocalyptic number.

16459861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16459861 is a deficient number, since it is larger than the sum of its proper divisors (1561163).

16459861 is a wasteful number, since it uses less digits than its factorization.

16459861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5411.

The product of its digits is 51840, while the sum is 40.

The square root of 16459861 is about 4057.0754244899. The cubic root of 16459861 is about 254.3755630065.

Subtracting 16459861 from its reverse (16895461), we obtain a square (435600 = 660²).

It can be divided in two parts, 164 and 59861, that added together give a square (60025 = 245²).

The spelling of 16459861 in words is "sixteen million, four hundred fifty-nine thousand, eight hundred sixty-one".