12655491 has 4 divisors (see below), whose sum is σ = 16873992. Its totient is φ = 8436992.

The previous prime is 12655481. The next prime is 12655547. The reversal of 12655491 is 19455621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19455621 = 3 ⋅6485207.

It is a cyclic number.

It is not a de Polignac number, because 12655491 - 2⁹ = 12654979 is a prime.

It is a super-2 number, since 2×12655491² = 320322904902162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12655411) 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, 2109246 + ... + 2109251.

It is an arithmetic number, because the mean of its divisors is an integer number (4218498).

Almost surely, 2^12655491 is an apocalyptic number.

12655491 is a deficient number, since it is larger than the sum of its proper divisors (4218501).

12655491 is an equidigital number, since it uses as much as digits as its factorization.

12655491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218500.

The product of its digits is 10800, while the sum is 33.

The square root of 12655491 is about 3557.4556919237. The cubic root of 12655491 is about 233.0377793063.

The spelling of 12655491 in words is "twelve million, six hundred fifty-five thousand, four hundred ninety-one".