11961601 has 8 divisors (see below), whose sum is σ = 12585600. Its totient is φ = 11351760.

The previous prime is 11961589. The next prime is 11961647. The reversal of 11961601 is 10616911.

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

It is not a de Polignac number, because 11961601 - 2⁵ = 11961569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11961661) 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, 1785 + ... + 5206.

It is an arithmetic number, because the mean of its divisors is an integer number (1573200).

Almost surely, 2^11961601 is an apocalyptic number.

It is an amenable number.

11961601 is a deficient number, since it is larger than the sum of its proper divisors (623999).

11961601 is an equidigital number, since it uses as much as digits as its factorization.

11961601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7079.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 11961601 is about 3458.5547559638. The cubic root of 11961601 is about 228.6983882286.

The spelling of 11961601 in words is "eleven million, nine hundred sixty-one thousand, six hundred one".