1121513263 has 4 divisors (see below), whose sum is σ = 1207783528. Its totient is φ = 1035243000.

The previous prime is 1121513213. The next prime is 1121513269. The reversal of 1121513263 is 3623151211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1121513263 - 2¹⁷ = 1121382191 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 (1121513269) 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, 43135113 + ... + 43135138.

It is an arithmetic number, because the mean of its divisors is an integer number (301945882).

Almost surely, 2^1121513263 is an apocalyptic number.

1121513263 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1121513263 is a deficient number, since it is larger than the sum of its proper divisors (86270265).

1121513263 is an equidigital number, since it uses as much as digits as its factorization.

1121513263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86270264.

The product of its digits is 1080, while the sum is 25.

The square root of 1121513263 is about 33489.0021200991. The cubic root of 1121513263 is about 1038.9663247142.

Adding to 1121513263 its reverse (3623151211), we get a palindrome (4744664474).

The spelling of 1121513263 in words is "one billion, one hundred twenty-one million, five hundred thirteen thousand, two hundred sixty-three".