11922147 has 20 divisors (see below), whose sum is σ = 17995120. Its totient is φ = 7865424.

The previous prime is 11922121. The next prime is 11922193. The reversal of 11922147 is 74122911.

It is not a de Polignac number, because 11922147 - 2⁷ = 11922019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11922147.

It is not an unprimeable number, because it can be changed into a prime (11922347) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7629 + ... + 9057.

It is an arithmetic number, because the mean of its divisors is an integer number (899756).

Almost surely, 2^11922147 is an apocalyptic number.

11922147 is a deficient number, since it is larger than the sum of its proper divisors (6072973).

11922147 is a wasteful number, since it uses less digits than its factorization.

11922147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544 (or 1535 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 11922147 is about 3452.8462172532. The cubic root of 11922147 is about 228.4466659340.

The spelling of 11922147 in words is "eleven million, nine hundred twenty-two thousand, one hundred forty-seven".