11722251 has 4 divisors (see below), whose sum is σ = 15629672. Its totient is φ = 7814832.

The previous prime is 11722201. The next prime is 11722283. The reversal of 11722251 is 15222711.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11722251 - 2¹⁸ = 11460107 is a prime.

It is a super-2 number, since 2×11722251² = 274822337014002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11722201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1953706 + ... + 1953711.

It is an arithmetic number, because the mean of its divisors is an integer number (3907418).

Almost surely, 2^11722251 is an apocalyptic number.

11722251 is a deficient number, since it is larger than the sum of its proper divisors (3907421).

11722251 is an equidigital number, since it uses as much as digits as its factorization.

11722251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907420.

The product of its digits is 280, while the sum is 21.

The square root of 11722251 is about 3423.7773000007. Note that the first 3 decimals coincide. The cubic root of 11722251 is about 227.1626913690.

Adding to 11722251 its reverse (15222711), we get a palindrome (26944962).

The spelling of 11722251 in words is "eleven million, seven hundred twenty-two thousand, two hundred fifty-one".