13561023 has 8 divisors (see below), whose sum is σ = 20664448. Its totient is φ = 7749144.

The previous prime is 13561021. The next prime is 13561027. The reversal of 13561023 is 32016531.

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

It is not a de Polignac number, because 13561023 - 2¹ = 13561021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 645763 = 13561023 / (1 + 3 + 5 + 6 + 1 + 0 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13561021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322861 + ... + 322902.

It is an arithmetic number, because the mean of its divisors is an integer number (2583056).

Almost surely, 2^13561023 is an apocalyptic number.

13561023 is a deficient number, since it is larger than the sum of its proper divisors (7103425).

13561023 is an equidigital number, since it uses as much as digits as its factorization.

13561023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645773.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 13561023 is about 3682.5294296176. The cubic root of 13561023 is about 238.4683888504.

Adding to 13561023 its reverse (32016531), we get a palindrome (45577554).

The spelling of 13561023 in words is "thirteen million, five hundred sixty-one thousand, twenty-three".