1265232163 has 16 divisors (see below), whose sum is σ = 1396523520. Its totient is φ = 1139153184.

The previous prime is 1265232119. The next prime is 1265232181. The reversal of 1265232163 is 3612325621.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1265232163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1265232193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77820 + ... + 92662.

It is an arithmetic number, because the mean of its divisors is an integer number (87282720).

Almost surely, 2^1265232163 is an apocalyptic number.

1265232163 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1265232163 is a deficient number, since it is larger than the sum of its proper divisors (131291357).

1265232163 is a wasteful number, since it uses less digits than its factorization.

1265232163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15018.

The product of its digits is 12960, while the sum is 31.

The square root of 1265232163 is about 35570.1020943151. The cubic root of 1265232163 is about 1081.5752512864.

Adding to 1265232163 its reverse (3612325621), we get a palindrome (4877557784).

The spelling of 1265232163 in words is "one billion, two hundred sixty-five million, two hundred thirty-two thousand, one hundred sixty-three".