11651071 has 4 divisors (see below), whose sum is σ = 12026944. Its totient is φ = 11275200.

The previous prime is 11651063. The next prime is 11651083. The reversal of 11651071 is 17015611.

11651071 = 1391² + 1392² + ... + 1396².

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11651071 - 2³ = 11651063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11651371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187890 + ... + 187951.

It is an arithmetic number, because the mean of its divisors is an integer number (3006736).

Almost surely, 2^11651071 is an apocalyptic number.

11651071 is a deficient number, since it is larger than the sum of its proper divisors (375873).

11651071 is an equidigital number, since it uses as much as digits as its factorization.

11651071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375872.

The product of its (nonzero) digits is 210, while the sum is 22.

The square root of 11651071 is about 3413.3665200210. The cubic root of 11651071 is about 226.7019641782.

Adding to 11651071 its reverse (17015611), we get a palindrome (28666682).

The spelling of 11651071 in words is "eleven million, six hundred fifty-one thousand, seventy-one".