1159561495 has 4 divisors (see below), whose sum is σ = 1391473800. Its totient is φ = 927649192.

The previous prime is 1159561493. The next prime is 1159561499. The reversal of 1159561495 is 5941659511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5941659511 = 17 ⋅349509383.

It is a cyclic number.

It is not a de Polignac number, because 1159561495 - 2¹ = 1159561493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159561493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115956145 + ... + 115956154.

It is an arithmetic number, because the mean of its divisors is an integer number (347868450).

Almost surely, 2^1159561495 is an apocalyptic number.

1159561495 is a deficient number, since it is larger than the sum of its proper divisors (231912305).

1159561495 is an equidigital number, since it uses as much as digits as its factorization.

1159561495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231912304.

The product of its digits is 243000, while the sum is 46.

The square root of 1159561495 is about 34052.3346483028. The cubic root of 1159561495 is about 1050.5851598493.

The spelling of 1159561495 in words is "one billion, one hundred fifty-nine million, five hundred sixty-one thousand, four hundred ninety-five".