16246561 has 4 divisors (see below), whose sum is σ = 16624432. Its totient is φ = 15868692.

The previous prime is 16246553. The next prime is 16246591. The reversal of 16246561 is 16564261.

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 not a de Polignac number, because 16246561 - 2³ = 16246553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16246541) 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, 188871 + ... + 188956.

It is an arithmetic number, because the mean of its divisors is an integer number (4156108).

Almost surely, 2^16246561 is an apocalyptic number.

It is an amenable number.

16246561 is a deficient number, since it is larger than the sum of its proper divisors (377871).

16246561 is an equidigital number, since it uses as much as digits as its factorization.

16246561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377870.

The product of its digits is 8640, while the sum is 31.

The square root of 16246561 is about 4030.7022961266. The cubic root of 16246561 is about 253.2719817191.

It can be divided in two parts, 16246 and 561, that added together give a 5-th power (16807 = 7⁵).

The spelling of 16246561 in words is "sixteen million, two hundred forty-six thousand, five hundred sixty-one".