12155773 has 6 divisors (see below), whose sum is σ = 14140446. Its totient is φ = 10419192.

The previous prime is 12155771. The next prime is 12155791. The reversal of 12155773 is 37755121.

It can be written as a sum of positive squares in only one way, i.e., 11573604 + 582169 = 3402^2 + 763^2 .

It is not a de Polignac number, because 12155773 - 2¹ = 12155771 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 (12155771) 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 5 ways as a sum of consecutive naturals, for example, 123990 + ... + 124087.

It is an arithmetic number, because the mean of its divisors is an integer number (2356741).

Almost surely, 2^12155773 is an apocalyptic number.

It is an amenable number.

12155773 is a deficient number, since it is larger than the sum of its proper divisors (1984673).

12155773 is an equidigital number, since it uses as much as digits as its factorization.

12155773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248091 (or 248084 counting only the distinct ones).

The product of its digits is 7350, while the sum is 31.

The square root of 12155773 is about 3486.5130144601. The cubic root of 12155773 is about 229.9292346882.

The spelling of 12155773 in words is "twelve million, one hundred fifty-five thousand, seven hundred seventy-three".