11901161 has 8 divisors (see below), whose sum is σ = 12425544. Its totient is φ = 11387520.

The previous prime is 11901157. The next prime is 11901167. The reversal of 11901161 is 16110911.

It can be written as a sum of positive squares in 4 ways, for example, as 1142761 + 10758400 = 1069^2 + 3280^2 .

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 11901161 - 2² = 11901157 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 (11901167) 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 7 ways as a sum of consecutive naturals, for example, 380 + ... + 4893.

It is an arithmetic number, because the mean of its divisors is an integer number (1553193).

Almost surely, 2^11901161 is an apocalyptic number.

It is an amenable number.

11901161 is a deficient number, since it is larger than the sum of its proper divisors (524383).

11901161 is an equidigital number, since it uses as much as digits as its factorization.

11901161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371.

The product of its (nonzero) digits is 54, while the sum is 20.

The square root of 11901161 is about 3449.8059365709. The cubic root of 11901161 is about 228.3125458666.

The spelling of 11901161 in words is "eleven million, nine hundred one thousand, one hundred sixty-one".