16426561 has 8 divisors (see below), whose sum is σ = 16661504. Its totient is φ = 16193520.

The previous prime is 16426517. The next prime is 16426567. The reversal of 16426561 is 16562461.

16426561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16426561 - 2⁷ = 16426433 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16426567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26491 + ... + 27103.

It is an arithmetic number, because the mean of its divisors is an integer number (2082688).

Almost surely, 2^16426561 is an apocalyptic number.

It is an amenable number.

16426561 is a deficient number, since it is larger than the sum of its proper divisors (234943).

16426561 is a wasteful number, since it uses less digits than its factorization.

16426561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951.

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

The square root of 16426561 is about 4052.9694052633. The cubic root of 16426561 is about 254.2039045085.

The spelling of 16426561 in words is "sixteen million, four hundred twenty-six thousand, five hundred sixty-one".