11816251 has 4 divisors (see below), whose sum is σ = 11901400. Its totient is φ = 11731104.

The previous prime is 11816237. The next prime is 11816269. The reversal of 11816251 is 15261811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15261811 = 23 ⋅663557.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11816251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11816201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42366 + ... + 42643.

It is an arithmetic number, because the mean of its divisors is an integer number (2975350).

Almost surely, 2^11816251 is an apocalyptic number.

11816251 is a deficient number, since it is larger than the sum of its proper divisors (85149).

11816251 is an equidigital number, since it uses as much as digits as its factorization.

11816251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85148.

The product of its digits is 480, while the sum is 25.

The square root of 11816251 is about 3437.4774181076. The cubic root of 11816251 is about 227.7682766786.

The spelling of 11816251 in words is "eleven million, eight hundred sixteen thousand, two hundred fifty-one".