1161265063 has 6 divisors (see below), whose sum is σ = 1350859416. Its totient is φ = 995370012.

The previous prime is 1161264977. The next prime is 1161265103. The reversal of 1161265063 is 3605621611.

It is not a de Polignac number, because 1161265063 - 2⁹ = 1161264551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161265463) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11849595 + ... + 11849692.

It is an arithmetic number, because the mean of its divisors is an integer number (225143236).

Almost surely, 2^1161265063 is an apocalyptic number.

1161265063 is a deficient number, since it is larger than the sum of its proper divisors (189594353).

1161265063 is an equidigital number, since it uses as much as digits as its factorization.

1161265063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23699301 (or 23699294 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1161265063 is about 34077.3394354665. The cubic root of 1161265063 is about 1051.0993966293.

Adding to 1161265063 its reverse (3605621611), we get a palindrome (4766886674).

The spelling of 1161265063 in words is "one billion, one hundred sixty-one million, two hundred sixty-five thousand, sixty-three".