1165551587 has 2 divisors, whose sum is σ = 1165551588. Its totient is φ = 1165551586.

The previous prime is 1165551521. The next prime is 1165551601. The reversal of 1165551587 is 7851555611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1165551587 - 2¹² = 1165547491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1165551787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582775793 + 582775794.

It is an arithmetic number, because the mean of its divisors is an integer number (582775794).

Almost surely, 2^1165551587 is an apocalyptic number.

1165551587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165551587 is an equidigital number, since it uses as much as digits as its factorization.

1165551587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 210000, while the sum is 44.

The square root of 1165551587 is about 34140.1755560806. The cubic root of 1165551587 is about 1052.3911001197.

The spelling of 1165551587 in words is "one billion, one hundred sixty-five million, five hundred fifty-one thousand, five hundred eighty-seven".