11212457 has 4 divisors (see below), whose sum is σ = 11220996. Its totient is φ = 11203920.

The previous prime is 11212447. The next prime is 11212501. The reversal of 11212457 is 75421211.

11212457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75421211 = 1777 ⋅42443.

It can be written as a sum of positive squares in 2 ways, for example, as 7958041 + 3254416 = 2821^2 + 1804^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212457 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11212427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1838 + ... + 5079.

It is an arithmetic number, because the mean of its divisors is an integer number (2805249).

Almost surely, 2^11212457 is an apocalyptic number.

It is an amenable number.

11212457 is a deficient number, since it is larger than the sum of its proper divisors (8539).

11212457 is an equidigital number, since it uses as much as digits as its factorization.

11212457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8538.

The product of its digits is 560, while the sum is 23.

The square root of 11212457 is about 3348.5007092727. The cubic root of 11212457 is about 223.8207071355.

Adding to 11212457 its sum of digits (23), we get a triangular number (11212480 = T₄₇₃₅).

Adding to 11212457 its reverse (75421211), we get a palindrome (86633668).

The spelling of 11212457 in words is "eleven million, two hundred twelve thousand, four hundred fifty-seven".