12111487 has 4 divisors (see below), whose sum is σ = 12198760. Its totient is φ = 12024216.

The previous prime is 12111479. The next prime is 12111499. The reversal of 12111487 is 78411121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78411121 = 31 ⋅2529391.

It is a cyclic number.

It is not a de Polignac number, because 12111487 - 2³ = 12111479 is a prime.

It is a super-3 number, since 3×12111487³ (a number of 22 digits) contains 333 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 (12111427) 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, 43428 + ... + 43705.

It is an arithmetic number, because the mean of its divisors is an integer number (3049690).

Almost surely, 2^12111487 is an apocalyptic number.

12111487 is a deficient number, since it is larger than the sum of its proper divisors (87273).

12111487 is an equidigital number, since it uses as much as digits as its factorization.

12111487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87272.

The product of its digits is 448, while the sum is 25.

The square root of 12111487 is about 3480.1561746565. The cubic root of 12111487 is about 229.6496682905.

The spelling of 12111487 in words is "twelve million, one hundred eleven thousand, four hundred eighty-seven".