1205263163 has 4 divisors (see below), whose sum is σ = 1297975728. Its totient is φ = 1112550600.

The previous prime is 1205263141. The next prime is 1205263177. The reversal of 1205263163 is 3613625021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3613625021 = 409 ⋅8835269.

It is a cyclic number.

It is not a de Polignac number, because 1205263163 - 2¹⁰ = 1205262139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205263133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46356263 + ... + 46356288.

It is an arithmetic number, because the mean of its divisors is an integer number (324493932).

Almost surely, 2^1205263163 is an apocalyptic number.

1205263163 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1205263163 is a deficient number, since it is larger than the sum of its proper divisors (92712565).

1205263163 is an equidigital number, since it uses as much as digits as its factorization.

1205263163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92712564.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1205263163 is about 34716.9002504544. The cubic root of 1205263163 is about 1064.2098992661.

Adding to 1205263163 its reverse (3613625021), we get a palindrome (4818888184).

The spelling of 1205263163 in words is "one billion, two hundred five million, two hundred sixty-three thousand, one hundred sixty-three".