11257891 has 2 divisors, whose sum is σ = 11257892. Its totient is φ = 11257890.

The previous prime is 11257843. The next prime is 11257901. The reversal of 11257891 is 19875211.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19875211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11257891 is a prime.

It is not a weakly prime, because it can be changed into another prime (11257801) 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 as a sum of consecutive naturals, namely, 5628945 + 5628946.

It is an arithmetic number, because the mean of its divisors is an integer number (5628946).

Almost surely, 2^11257891 is an apocalyptic number.

11257891 is a deficient number, since it is larger than the sum of its proper divisors (1).

11257891 is an equidigital number, since it uses as much as digits as its factorization.

11257891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 34.

The square root of 11257891 is about 3355.2780808750. The cubic root of 11257891 is about 224.1226143649.

The spelling of 11257891 in words is "eleven million, two hundred fifty-seven thousand, eight hundred ninety-one".