1115124261 has 4 divisors (see below), whose sum is σ = 1486832352. Its totient is φ = 743416172.

The previous prime is 1115124259. The next prime is 1115124271. The reversal of 1115124261 is 1624215111.

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 an emirpimes, since its reverse is a distinct semiprime: 1624215111 = 3 ⋅541405037.

It is a cyclic number.

It is not a de Polignac number, because 1115124261 - 2¹ = 1115124259 is a prime.

It is a super-2 number, since 2×1115124261² = 2487004234941592242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115124251) 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, 185854041 + ... + 185854046.

It is an arithmetic number, because the mean of its divisors is an integer number (371708088).

Almost surely, 2^1115124261 is an apocalyptic number.

It is an amenable number.

1115124261 is a deficient number, since it is larger than the sum of its proper divisors (371708091).

1115124261 is an equidigital number, since it uses as much as digits as its factorization.

1115124261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371708090.

The product of its digits is 480, while the sum is 24.

The square root of 1115124261 is about 33393.4763239768. The cubic root of 1115124261 is about 1036.9896493410.

Adding to 1115124261 its reverse (1624215111), we get a palindrome (2739339372).

The spelling of 1115124261 in words is "one billion, one hundred fifteen million, one hundred twenty-four thousand, two hundred sixty-one".