11565487 has 2 divisors, whose sum is σ = 11565488. Its totient is φ = 11565486.

The previous prime is 11565443. The next prime is 11565551. The reversal of 11565487 is 78456511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11565487 - 2²³ = 3176879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11565787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782743 + 5782744.

It is an arithmetic number, because the mean of its divisors is an integer number (5782744).

Almost surely, 2^11565487 is an apocalyptic number.

11565487 is a deficient number, since it is larger than the sum of its proper divisors (1).

11565487 is an equidigital number, since it uses as much as digits as its factorization.

11565487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 37.

The square root of 11565487 is about 3400.8068160365. The cubic root of 11565487 is about 226.1455128368.

The spelling of 11565487 in words is "eleven million, five hundred sixty-five thousand, four hundred eighty-seven".