16459421 has 16 divisors (see below), whose sum is σ = 19035648. Its totient is φ = 14084400.

The previous prime is 16459403. The next prime is 16459423. The reversal of 16459421 is 12495461.

16459421 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 16459421 - 2²² = 12265117 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 (16459423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16466 + ... + 17436.

It is an arithmetic number, because the mean of its divisors is an integer number (1189728).

Almost surely, 2^16459421 is an apocalyptic number.

16459421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16459421 is a deficient number, since it is larger than the sum of its proper divisors (2576227).

16459421 is a wasteful number, since it uses less digits than its factorization.

16459421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072.

The product of its digits is 8640, while the sum is 32.

The square root of 16459421 is about 4057.0211978741. The cubic root of 16459421 is about 254.3732963562.

Adding to 16459421 its sum of digits (32), we get a triangular number (16459453 = T₅₇₃₇).

The spelling of 16459421 in words is "sixteen million, four hundred fifty-nine thousand, four hundred twenty-one".