1240263163 has 4 divisors (see below), whose sum is σ = 1260595408. Its totient is φ = 1219930920.

The previous prime is 1240263139. The next prime is 1240263173. The reversal of 1240263163 is 3613620421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240263163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240263103) 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, 10166031 + ... + 10166152.

It is an arithmetic number, because the mean of its divisors is an integer number (315148852).

Almost surely, 2^1240263163 is an apocalyptic number.

1240263163 is a deficient number, since it is larger than the sum of its proper divisors (20332245).

1240263163 is an equidigital number, since it uses as much as digits as its factorization.

1240263163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20332244.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1240263163 is about 35217.3701885873. The cubic root of 1240263163 is about 1074.4130671632.

Adding to 1240263163 its reverse (3613620421), we get a palindrome (4853883584).

The spelling of 1240263163 in words is "one billion, two hundred forty million, two hundred sixty-three thousand, one hundred sixty-three".