11111257 has 8 divisors (see below), whose sum is σ = 11857760. Its totient is φ = 10380960.

The previous prime is 11111209. The next prime is 11111267. The reversal of 11111257 is 75211111.

11111257 is digitally balanced in base 2 and base 3, because in such bases 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 (11111267) 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, 2619 + ... + 5392.

It is an arithmetic number, because the mean of its divisors is an integer number (1482220).

Almost surely, 2^11111257 is an apocalyptic number.

It is an amenable number.

11111257 is a deficient number, since it is larger than the sum of its proper divisors (746503).

11111257 is an equidigital number, since it uses as much as digits as its factorization.

11111257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8103.

The product of its digits is 70, while the sum is 19.

The square root of 11111257 is about 3333.3552165948. The cubic root of 11111257 is about 223.1452933181.

Adding to 11111257 its reverse (75211111), we get a palindrome (86322368).

The spelling of 11111257 in words is "eleven million, one hundred eleven thousand, two hundred fifty-seven".