16245643 has 4 divisors (see below), whose sum is σ = 16769728. Its totient is φ = 15721560.

The previous prime is 16245641. The next prime is 16245653. The reversal of 16245643 is 34654261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16245643 - 2¹ = 16245641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 524053 = 16245643 / (1 + 6 + 2 + 4 + 5 + 6 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16245641) 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, 261996 + ... + 262057.

It is an arithmetic number, because the mean of its divisors is an integer number (4192432).

Almost surely, 2^16245643 is an apocalyptic number.

16245643 is a deficient number, since it is larger than the sum of its proper divisors (524085).

16245643 is an equidigital number, since it uses as much as digits as its factorization.

16245643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524084.

The product of its digits is 17280, while the sum is 31.

The square root of 16245643 is about 4030.5884185811. The cubic root of 16245643 is about 253.2672113135.

The spelling of 16245643 in words is "sixteen million, two hundred forty-five thousand, six hundred forty-three".