16246021 has 4 divisors (see below), whose sum is σ = 17722944. Its totient is φ = 14769100.

The previous prime is 16246001. The next prime is 16246031. The reversal of 16246021 is 12064261.

It is the 1646-th star 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16246021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16245983 and 16246001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16246001) 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, 738445 + ... + 738466.

It is an arithmetic number, because the mean of its divisors is an integer number (4430736).

Almost surely, 2^16246021 is an apocalyptic number.

16246021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16246021 is a deficient number, since it is larger than the sum of its proper divisors (1476923).

16246021 is a wasteful number, since it uses less digits than its factorization.

16246021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476922.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 16246021 is about 4030.6353097248. The cubic root of 16246021 is about 253.2691756199.

The spelling of 16246021 in words is "sixteen million, two hundred forty-six thousand, twenty-one".