1111242641 has 4 divisors (see below), whose sum is σ = 1115035572. Its totient is φ = 1107449712.

The previous prime is 1111242623. The next prime is 1111242659. The reversal of 1111242641 is 1462421111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1462421111 = 6709 ⋅217979.

It is an interprime number because it is at equal distance from previous prime (1111242623) and next prime (1111242659).

It can be written as a sum of positive squares in 2 ways, for example, as 719044225 + 392198416 = 26815^2 + 19804^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111242641 - 2¹⁰ = 1111241617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1111242611) 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, 1896026 + ... + 1896611.

It is an arithmetic number, because the mean of its divisors is an integer number (278758893).

Almost surely, 2^1111242641 is an apocalyptic number.

It is an amenable number.

1111242641 is a deficient number, since it is larger than the sum of its proper divisors (3792931).

1111242641 is an equidigital number, since it uses as much as digits as its factorization.

1111242641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792930.

The product of its digits is 384, while the sum is 23.

The square root of 1111242641 is about 33335.3062232822. The cubic root of 1111242641 is about 1035.7850364334.

Adding to 1111242641 its reverse (1462421111), we get a palindrome (2573663752).

The spelling of 1111242641 in words is "one billion, one hundred eleven million, two hundred forty-two thousand, six hundred forty-one".