1115232261 has 16 divisors (see below), whose sum is σ = 1746937920. Its totient is φ = 623905920.

The previous prime is 1115232259. The next prime is 1115232263. The reversal of 1115232261 is 1622325111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1115232259) and next prime (1115232263).

It is not a de Polignac number, because 1115232261 - 2¹ = 1115232259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115232263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1299376 + ... + 1300233.

It is an arithmetic number, because the mean of its divisors is an integer number (109183620).

Almost surely, 2^1115232261 is an apocalyptic number.

1115232261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1115232261 is a deficient number, since it is larger than the sum of its proper divisors (631705659).

1115232261 is a wasteful number, since it uses less digits than its factorization.

1115232261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2599636.

The product of its digits is 720, while the sum is 24.

The square root of 1115232261 is about 33395.0933671400. The cubic root of 1115232261 is about 1037.0231258096.

Adding to 1115232261 its reverse (1622325111), we get a palindrome (2737557372).

The spelling of 1115232261 in words is "one billion, one hundred fifteen million, two hundred thirty-two thousand, two hundred sixty-one".