11111457 has 8 divisors (see below), whose sum is σ = 16931776. Its totient is φ = 6349392.

The previous prime is 11111431. The next prime is 11111491. The reversal of 11111457 is 75411111.

11111457 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11111457 - 2⁶ = 11111393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 529117 = 11111457 / (1 + 1 + 1 + 1 + 1 + 4 + 5 + 7).

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11111407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264538 + ... + 264579.

It is an arithmetic number, because the mean of its divisors is an integer number (2116472).

Almost surely, 2^11111457 is an apocalyptic number.

It is an amenable number.

11111457 is a deficient number, since it is larger than the sum of its proper divisors (5820319).

11111457 is an equidigital number, since it uses as much as digits as its factorization.

11111457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529127.

The product of its digits is 140, while the sum is 21.

The square root of 11111457 is about 3333.3852162629. The cubic root of 11111457 is about 223.1466321642.

Adding to 11111457 its reverse (75411111), we get a palindrome (86522568).

The spelling of 11111457 in words is "eleven million, one hundred eleven thousand, four hundred fifty-seven".