12487169 has 4 divisors (see below), whose sum is σ = 12540996. Its totient is φ = 12433344.

The previous prime is 12487147. The next prime is 12487177. The reversal of 12487169 is 96178421.

It is a Cunningham number, because it is equal to 232³+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96178421 = 8831 ⋅10891.

It can be written as a sum of positive squares in 2 ways, for example, as 4048144 + 8439025 = 2012^2 + 2905^2 .

It is a cyclic number.

It is not a de Polignac number, because 12487169 - 2²⁰ = 11438593 is a prime.

It is a super-2 number, since 2×12487169² = 311858779269122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12487109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26564 + ... + 27029.

It is an arithmetic number, because the mean of its divisors is an integer number (3135249).

Almost surely, 2^12487169 is an apocalyptic number.

It is an amenable number.

12487169 is a deficient number, since it is larger than the sum of its proper divisors (53827).

12487169 is an equidigital number, since it uses as much as digits as its factorization.

12487169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53826.

The product of its digits is 24192, while the sum is 38.

The square root of 12487169 is about 3533.7188626149. The cubic root of 12487169 is about 232.0000061930. Note that the first 5 decimals are identical.

The spelling of 12487169 in words is "twelve million, four hundred eighty-seven thousand, one hundred sixty-nine".