12115487 has 4 divisors (see below), whose sum is σ = 12151776. Its totient is φ = 12079200.

The previous prime is 12115471. The next prime is 12115501. The reversal of 12115487 is 78451121.

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 12115487 - 2⁴ = 12115471 is a prime.

It is a super-5 number, since 5×12115487⁵ (a number of 37 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12115387) 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, 17639 + ... + 18312.

It is an arithmetic number, because the mean of its divisors is an integer number (3037944).

Almost surely, 2^12115487 is an apocalyptic number.

12115487 is a deficient number, since it is larger than the sum of its proper divisors (36289).

12115487 is an equidigital number, since it uses as much as digits as its factorization.

12115487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36288.

The product of its digits is 2240, while the sum is 29.

The square root of 12115487 is about 3480.7308140676. The cubic root of 12115487 is about 229.6749472554.

The spelling of 12115487 in words is "twelve million, one hundred fifteen thousand, four hundred eighty-seven".