1115140253 has 4 divisors (see below), whose sum is σ = 1115207808. Its totient is φ = 1115072700.

The previous prime is 1115140249. The next prime is 1115140291. The reversal of 1115140253 is 3520415111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3520415111 = 26647 ⋅132113.

It is a cyclic number.

It is not a de Polignac number, because 1115140253 - 2² = 1115140249 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 (1115140223) 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, 9278 + ... + 48128.

It is an arithmetic number, because the mean of its divisors is an integer number (278801952).

Almost surely, 2^1115140253 is an apocalyptic number.

It is an amenable number.

1115140253 is a deficient number, since it is larger than the sum of its proper divisors (67555).

1115140253 is an equidigital number, since it uses as much as digits as its factorization.

1115140253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67554.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1115140253 is about 33393.7157710848. The cubic root of 1115140253 is about 1036.9946064745.

Adding to 1115140253 its reverse (3520415111), we get a palindrome (4635555364).

The spelling of 1115140253 in words is "one billion, one hundred fifteen million, one hundred forty thousand, two hundred fifty-three".