16046421 has 4 divisors (see below), whose sum is σ = 21395232. Its totient is φ = 10697612.

The previous prime is 16046413. The next prime is 16046423. The reversal of 16046421 is 12464061.

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: 12464061 = 3 ⋅4154687.

It is a cyclic number.

It is not a de Polignac number, because 16046421 - 2³ = 16046413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16046391 and 16046400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16046423) 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, 2674401 + ... + 2674406.

It is an arithmetic number, because the mean of its divisors is an integer number (5348808).

Almost surely, 2^16046421 is an apocalyptic number.

It is an amenable number.

16046421 is a deficient number, since it is larger than the sum of its proper divisors (5348811).

16046421 is an equidigital number, since it uses as much as digits as its factorization.

16046421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5348810.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 16046421 is about 4005.7984222874. The cubic root of 16046421 is about 252.2276696591.

The spelling of 16046421 in words is "sixteen million, forty-six thousand, four hundred twenty-one".