12677581 has 4 divisors (see below), whose sum is σ = 14488672. Its totient is φ = 10866492.

The previous prime is 12677557. The next prime is 12677627. The reversal of 12677581 is 18577621.

12677581 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18577621 = 557 ⋅33353.

It is not a de Polignac number, because 12677581 - 2²¹ = 10580429 is a prime.

It is a super-2 number, since 2×12677581² = 321442120023122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12677581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12677381) 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, 905535 + ... + 905548.

It is an arithmetic number, because the mean of its divisors is an integer number (3622168).

Almost surely, 2^12677581 is an apocalyptic number.

It is an amenable number.

12677581 is a deficient number, since it is larger than the sum of its proper divisors (1811091).

12677581 is an equidigital number, since it uses as much as digits as its factorization.

12677581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811090.

The product of its digits is 23520, while the sum is 37.

The square root of 12677581 is about 3560.5590853123. The cubic root of 12677581 is about 233.1732886622.

The spelling of 12677581 in words is "twelve million, six hundred seventy-seven thousand, five hundred eighty-one".