1115265643 has 4 divisors (see below), whose sum is σ = 1115584848. Its totient is φ = 1114946440.

The previous prime is 1115265631. The next prime is 1115265691. The reversal of 1115265643 is 3465625111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3465625111 = 13 ⋅266586547.

It is a cyclic number.

It is not a de Polignac number, because 1115265643 - 2⁹ = 1115265131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1115265599 and 1115265608.

It is not an unprimeable number, because it can be changed into a prime (1115265343) 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, 154303 + ... + 161368.

It is an arithmetic number, because the mean of its divisors is an integer number (278896212).

Almost surely, 2^1115265643 is an apocalyptic number.

1115265643 is a deficient number, since it is larger than the sum of its proper divisors (319205).

1115265643 is an equidigital number, since it uses as much as digits as its factorization.

1115265643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319204.

The product of its digits is 21600, while the sum is 34.

The square root of 1115265643 is about 33395.5931673627. The cubic root of 1115265643 is about 1037.0334727008.

The spelling of 1115265643 in words is "one billion, one hundred fifteen million, two hundred sixty-five thousand, six hundred forty-three".