12087729 has 6 divisors (see below), whose sum is σ = 17460066. Its totient is φ = 8058480.

The previous prime is 12087727. The next prime is 12087749. The reversal of 12087729 is 92778021.

12087729 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11189025 + 898704 = 3345^2 + 948^2 .

It is not a de Polignac number, because 12087729 - 2¹ = 12087727 is a prime.

It is a super-2 number, since 2×12087729² = 292226384754882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12087693 and 12087702.

It is not an unprimeable number, because it can be changed into a prime (12087727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 671532 + ... + 671549.

It is an arithmetic number, because the mean of its divisors is an integer number (2910011).

Almost surely, 2^12087729 is an apocalyptic number.

It is an amenable number.

12087729 is a deficient number, since it is larger than the sum of its proper divisors (5372337).

12087729 is a wasteful number, since it uses less digits than its factorization.

12087729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343087 (or 1343084 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 12087729 is about 3476.7411465336. The cubic root of 12087729 is about 229.4994090577.

The spelling of 12087729 in words is "twelve million, eighty-seven thousand, seven hundred twenty-nine".