11257121 has 4 divisors (see below), whose sum is σ = 11415744. Its totient is φ = 11098500.

The previous prime is 11257109. The next prime is 11257151. The reversal of 11257121 is 12175211.

It is a happy number.

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: 12175211 = 23 ⋅529357.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11257121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11257093 and 11257102.

It is not an unprimeable number, because it can be changed into a prime (11257151) 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 3 ways as a sum of consecutive naturals, for example, 79205 + ... + 79346.

It is an arithmetic number, because the mean of its divisors is an integer number (2853936).

Almost surely, 2^11257121 is an apocalyptic number.

It is an amenable number.

11257121 is a deficient number, since it is larger than the sum of its proper divisors (158623).

11257121 is an equidigital number, since it uses as much as digits as its factorization.

11257121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158622.

The product of its digits is 140, while the sum is 20.

The square root of 11257121 is about 3355.1633343252. The cubic root of 11257121 is about 224.1175045165.

The spelling of 11257121 in words is "eleven million, two hundred fifty-seven thousand, one hundred twenty-one".