1115651251 has 8 divisors (see below), whose sum is σ = 1310695344. Its totient is φ = 936210720.

The previous prime is 1115651249. The next prime is 1115651261. The reversal of 1115651251 is 1521565111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1115651251 - 2¹ = 1115651249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115651261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3900736 + ... + 3901021.

It is an arithmetic number, because the mean of its divisors is an integer number (163836918).

Almost surely, 2^1115651251 is an apocalyptic number.

1115651251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1115651251 is a deficient number, since it is larger than the sum of its proper divisors (195044093).

1115651251 is a wasteful number, since it uses less digits than its factorization.

1115651251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7801781.

The product of its digits is 1500, while the sum is 28.

The square root of 1115651251 is about 33401.3660050005. The cubic root of 1115651251 is about 1037.1529785563.

The spelling of 1115651251 in words is "one billion, one hundred fifteen million, six hundred fifty-one thousand, two hundred fifty-one".