1224181 has 8 divisors (see below), whose sum is σ = 1408320. Its totient is φ = 1042368.

The previous prime is 1224169. The next prime is 1224193. The reversal of 1224181 is 1814221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1224169) and next prime (1224193).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1224181 - 2⁵ = 1224149 is a prime.

It is a super-2 number, since 2×1224181² = 2997238241522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224121) 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 7 ways as a sum of consecutive naturals, for example, 765 + ... + 1741.

It is an arithmetic number, because the mean of its divisors is an integer number (176040).

2^1224181 is an apocalyptic number.

It is an amenable number.

1224181 is a deficient number, since it is larger than the sum of its proper divisors (184139).

1224181 is an equidigital number, since it uses as much as digits as its factorization.

1224181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163.

The product of its digits is 128, while the sum is 19.

The square root of 1224181 is about 1106.4271327114. The cubic root of 1224181 is about 106.9748973051.

The spelling of 1224181 in words is "one million, two hundred twenty-four thousand, one hundred eighty-one".