1154221 has 2 divisors, whose sum is σ = 1154222. Its totient is φ = 1154220.

The previous prime is 1154207. The next prime is 1154227. The reversal of 1154221 is 1224511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1028196 + 126025 = 1014^2 + 355^2 .

It is a cyclic number.

It is not a de Polignac number, because 1154221 - 2¹⁵ = 1121453 is a prime.

It is a super-2 number, since 2×1154221² = 2664452233682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1154195 and 1154204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1154227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577110 + 577111.

It is an arithmetic number, because the mean of its divisors is an integer number (577111).

2^1154221 is an apocalyptic number.

It is an amenable number.

1154221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154221 is an equidigital number, since it uses as much as digits as its factorization.

1154221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80, while the sum is 16.

The square root of 1154221 is about 1074.3467782797. The cubic root of 1154221 is about 104.8969813469.

Adding to 1154221 its reverse (1224511), we get a palindrome (2378732).

The spelling of 1154221 in words is "one million, one hundred fifty-four thousand, two hundred twenty-one".