11211457 has 2 divisors, whose sum is σ = 11211458. Its totient is φ = 11211456.

The previous prime is 11211439. The next prime is 11211469. The reversal of 11211457 is 75411211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9024016 + 2187441 = 3004^2 + 1479^2 .

It is an emirp because it is prime and its reverse (75411211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211457 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605728 + 5605729.

It is an arithmetic number, because the mean of its divisors is an integer number (5605729).

Almost surely, 2^11211457 is an apocalyptic number.

It is an amenable number.

11211457 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211457 is an equidigital number, since it uses as much as digits as its factorization.

11211457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 280, while the sum is 22.

The square root of 11211457 is about 3348.3513853836. The cubic root of 11211457 is about 223.8140530079.

Adding to 11211457 its reverse (75411211), we get a palindrome (86622668).

The spelling of 11211457 in words is "eleven million, two hundred eleven thousand, four hundred fifty-seven".