11945651 has 4 divisors (see below), whose sum is σ = 12357600. Its totient is φ = 11533704.

The previous prime is 11945641. The next prime is 11945653. The reversal of 11945651 is 15654911.

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 11945651 - 2²² = 7751347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11945653) 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 3 ways as a sum of consecutive naturals, for example, 205931 + ... + 205988.

It is an arithmetic number, because the mean of its divisors is an integer number (3089400).

Almost surely, 2^11945651 is an apocalyptic number.

11945651 is a deficient number, since it is larger than the sum of its proper divisors (411949).

11945651 is an equidigital number, since it uses as much as digits as its factorization.

11945651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411948.

The product of its digits is 5400, while the sum is 32.

The square root of 11945651 is about 3456.2481103069. The cubic root of 11945651 is about 228.5966916459.

The spelling of 11945651 in words is "eleven million, nine hundred forty-five thousand, six hundred fifty-one".