13670561 has 8 divisors (see below), whose sum is σ = 14031360. Its totient is φ = 13312768.

The previous prime is 13670551. The next prime is 13670599. The reversal of 13670561 is 16507631.

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 13670561 - 2⁶ = 13670497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13670521) 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, 10625 + ... + 11841.

It is an arithmetic number, because the mean of its divisors is an integer number (1753920).

Almost surely, 2^13670561 is an apocalyptic number.

It is an amenable number.

13670561 is a deficient number, since it is larger than the sum of its proper divisors (360799).

13670561 is a wasteful number, since it uses less digits than its factorization.

13670561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 13670561 is about 3697.3721749372. The cubic root of 13670561 is about 239.1087371316.

The spelling of 13670561 in words is "thirteen million, six hundred seventy thousand, five hundred sixty-one".