11961659 has 16 divisors (see below), whose sum is σ = 13802400. Its totient is φ = 10289664.

The previous prime is 11961647. The next prime is 11961661. The reversal of 11961659 is 95616911.

It is a happy number.

It is not a de Polignac number, because 11961659 - 2¹² = 11957563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11961259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8729 + ... + 10005.

It is an arithmetic number, because the mean of its divisors is an integer number (862650).

Almost surely, 2^11961659 is an apocalyptic number.

11961659 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11961659 is a deficient number, since it is larger than the sum of its proper divisors (1840741).

11961659 is a wasteful number, since it uses less digits than its factorization.

11961659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342.

The product of its digits is 14580, while the sum is 38.

The square root of 11961659 is about 3458.5631409590. The cubic root of 11961659 is about 228.6987578693.

The spelling of 11961659 in words is "eleven million, nine hundred sixty-one thousand, six hundred fifty-nine".