13377561 has 8 divisors (see below), whose sum is σ = 18021024.
Its totient is φ = 8826240.
The previous prime is 13377557. The next prime is 13377583. The reversal of 13377561 is 16577331.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 13377561 - 22 = 13377557 is a prime.
It is not an unprimeable number, because it can be changed into a prime (13377541) 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, 22695 + ... + 23276.
It is an arithmetic number, because the mean of its divisors is an integer number (2252628).
Almost surely, 213377561 is an apocalyptic number.
It is an amenable number.
13377561 is a deficient number, since it is larger than the sum of its proper divisors (4643463).
13377561 is an equidigital number, since it uses as much as digits as its factorization.
13377561 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 46071.
The product of its digits is 13230, while the sum is 33.
The square root of 13377561 is about 3657.5348255348.
The cubic root of 13377561 is about 237.3881194185.
The spelling of 13377561 in words is "thirteen million, three hundred seventy-seven thousand, five hundred sixty-one".