11142247 has 2 divisors, whose sum is σ = 11142248. Its totient is φ = 11142246.

The previous prime is 11142223. The next prime is 11142251. The reversal of 11142247 is 74224111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11142247 - 2¹⁵ = 11109479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11142847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5571123 + 5571124.

It is an arithmetic number, because the mean of its divisors is an integer number (5571124).

Almost surely, 2^11142247 is an apocalyptic number.

11142247 is a deficient number, since it is larger than the sum of its proper divisors (1).

11142247 is an equidigital number, since it uses as much as digits as its factorization.

11142247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 22.

The square root of 11142247 is about 3338.0004493709. Note that the first 3 decimals coincide. The cubic root of 11142247 is about 223.3525562029.

Adding to 11142247 its reverse (74224111), we get a palindrome (85366358).

The spelling of 11142247 in words is "eleven million, one hundred forty-two thousand, two hundred forty-seven".